Posts Tagged ‘blood’

Generic Name
colchicine (KOLE-chih-sene)
Type of Drug Antigout medication.
Prescribed For
Prevention and treatment of gouty arthritis; also prescribed for Mediterranean fever; chronic progressive multiple sclerosis; cirrhosis of the liver; biliary cirrhosis; Beh~et’s disease’, pseudogout (a condition caused by calcium deposits); amyloidosis; very low blood-platelet count (also known as ITP); skin reactions, including scleroderma, psoriasis, Sweet Syndrome, and other conditions; and nerve disability associated with chronic progressive multiple sclerosis.
General Information
While no one knows exactly how colchicine works, it appears to help people with gout by reducing the inflammatory response to uric acid crystals that form inside joints and by interfering with the body’s mechanism for making uric acid. Unlike drugs that affect uric acid levels, colchicine does not block the progression of gout to chronic gouty arthritis; it will, however, relieve the pain of acute attacks and lessen the frequency and severity of attacks. It has no effect on other kinds of pain.
Cautions and Warnings
Do not use colchicine if you are allergic or sensitive to any of its ingredients or you suffer from any serious blood, kidney, liver, stomach, or cardiac condition.
Vomiting, abdominal pain, diarrhea, nausea, kidney damage, and blood in the urine may occur with colchicine, especially at maximum doses. This can worsen existing gastrointestinal (GI) or other conditions. Stop taking the medication and call your doctor if you develop one of these symptoms.
She weakness that people develop while taking colchicine is frequently related to high levels of colchicine in the blood caused by poor kidney function and improves without treatment 3-4 weeks after the drug is stopped. This reaction is often mistaken for other conditions.
Periodic blood counts should be done if you are taking
colchicine for long periods of time.
Colchicine interferes with the absorption of vitamin B12 by af-
fecting the lining of the GI tract.
Colchicine may affect the process of sperm generation in men. The safety and effectiveness for use by children have not been
established.
Possible Side Effects
V Common: vomiting, diarrhea, and abdominal pain may occur if you take maximum doses of colchicine for an acute gout attack. You may also experience severe diarrhea, kidney and blood-vessel damage, blood in the urine, and reduced urination.
✓    Less common: hair loss, rash, appetite loss, and muscle and nerve weakness.
✓    Rare: with long-term colchicine therapy—reduced whiteblood-cell and platelet counts, nerve inflammation, blood-clotting problems, rash, unusual bleeding or bruising, tingling in the hands or feet, red or purple spots under the skin, and other reactions. Colchicine may interfere with sperm formation. Contact your doctor if you experience any side effect not listed above.
Drug Interactions
•    Colchicine interferes with the absorption of vitamin B12.
•    Colchicine may increase sensitivity to central-nervoussystem depressants, such as sedatives and alcohol.
•    The following drugs may reduce colchicine’s effectiveness: anticancer drugs, bumetanide, diazoxide, thiazide diuretics, ethacrynic acid, furosemide, mecamylamine, pyrazinamide, and triamterene.
•    Taking phenylbutazone with colchicine increases the risk of side effects.
•    Mixing the anitiiofic clarithromycin with colchicine can lead to colchicine toxicity, especially in the elderly and those with kidney disease.
Food Interactions None known.
Usual Dose
Acute Gout Attack: 1-1.2 mg. This dose may be followed by 0.51.2 mg every 1-2 hours until pain is relieved or nausea, vomiting, or diarrhea occurs. The total dose needed to control pain and in-
flammation during an attack varies from 4-8 mg.
Gout Prevention: 0.5-1.8 mg daily. In mild cases, 0.5 mg or 0.6 mg may be taken 3-4 days a week.
Familial Mediterranean Fever: 1-2 mg a day.
Cirrhosis of the Liver: 1 mg a day for 5 days each week. Biliary Cirrhosis: 0.6 mg twice a day.
Amyloidosis: 0.5 mg 1-2 times a day.
Behqet’s Disease: 0.5-1.5 mg a day.
Pseudogout: 0.6 mg twice a day.
ITP: 1.2-1.8 mg a day for 2 weeks or more.
Scleroderma: 1 mg a day.
Sweet Syndrome: 0.5 mg 1-3 times a day.
Other Skin Disorders: up to 1.8 mg a day, depending on the specific condition.
Overdosage
The lethal dose is estimated at 65 mg, although people have died after taking as little as 7 mg at once. Usually 1-3 days pass between the time that an overdose is taken and symptoms begin. Overdose symptoms start with nausea, vomiting, stomach pain, diarrhea—which may be severe and bloody—and burning sensations in the throat or stomach or on the skin. If you think you are experiencing overdose symptoms, contact your doctor immediately, or go to a hospital emergency room. ALWAYS bring the prescription bottle or container.
Special Information
Call your doctor if you develop rash, sore throat, fever, unusual bleeding or bruising, tiredness, weakness, numbness, or tingling. Seniors are move 4,ialy to develop drug side effects and should use this drug with caution.
Stop taking maximum doses of colchicine as soon as gout pain is relieved and reduce your dose to a maintenance level if your doctor has prescribed it for gout prevention. Stop taking the drug entirely and contact your doctor at the first sign of nausea, vomiting, stomach pain, or diarrhea.
If you forget a dose of colchicine, take it as soon as possible. If it is almost time for your next dose, skip the dose you forgot and continue with your regular schedule. Do not take a double dose.
Special Populations
Pregnancy/Breast-feeding: colchicine can harm the fetus. Pregnant women should not take it unless the potential benefits clearly outweigh the risks.
It is not known if colchicine passes into breast milk. No problems with nursing infants are known, but nursing mothers who must take colchicine should consider using infant formula.
Seniors: Seniors, especially those with renal, hepatic, gastrointestinal, or heart disease, are more likely to develop side effects and should use colchicine with caution.

Type of Drug
Contraceptives
Plan B
Prescribed For
Prevention of pregnancy, endometriosis, excessive menstruation, and cyclic withdrawal bleeding. Ortho Tri-Cyclen and Estrostep may be prescribed for moderate acne in women over age 15.
General Information
Contraceptive drugs are synthetic hormones containing either progestin or a progestin-estrogen combination. The overall effects of any contraceptive are influenced by the interaction of all active ingredients, including those Huth -&))Otogenic and anti-estrogenic aqtk%(kkj.’%tte drugs are similar to natural female hormones, which cannot be used as contraceptives because very large dosages would be required. Synthetic hormones are more potent and are effective at smaller dosages. Contraceptive drugs work by preventing sperm from reaching the unfertilized egg, preventing the implantation of a fertilized egg in the uterus, or preventing ovula-tion (the release of an unfertilized egg from the ovaries). They prevent acne by balancing hormone levels.
When properly used, hormonal contraceptives can be 97-99% effective at preventing pregnancy. These products vary in their etfectiveness, and in the amount and type of estrogen or progestin used. The side effects of these drugs tend to increase with the amount of hormone they contain. While low hormone dosages are preferred, contraceptives with the smallest amounts of estrogen may be less effective in some women than others.
Single-phase products provide constant levels of estrogen and progestin throughout the entire month-long pill cycle. In 2-phase combinations, the amount of estrogen remains at a steady low level throughout the cycle, while progestin levels increase and then decrease. This variation in progestin allows normal changes to take place in the uterus. Three-phase products are meant to simulate the normal hormone cycle and reduce breakthrough bleeding. Throughout the cycle, estrogen levels remain the same while those of progestin change to create a 3-part wave pattern. The amount of estrogen in 3-phase products is considered low. Breakthrough bleeding may occur with the older combination products from day 8 through 16 of the cycle.
The mini-pill, a progestin-only product, may cause irregular menstrual cycles and may be less effective than estrogenprogestin combinations. Mini-pills may be recommended to older women or women who should avoid estrogens (see “Cautions and Warnings”).
The contraceptive patch releases small amounts of progestin and estrogen continuously over 3 weeks. The medication is absorbed into the blood vessels just below the skin. The patch works in the same way as contraceptive pills do.
The vaginal ring releases small amounts of etonogestrel, a progestin, and estradiol, an estrogen, in the vaginal canal over 3 weeks. The combination prevents pregnancy in the same way as combination pills do but may be less effective than contraceptive pills because some people find them harder to use.
Most contraceptive drugs are designed to simulate a normal Mt%VwM cycle. By not taking the hormones 1 week out of the month, you continue to have your regular period. In fact, these products are often used to stabilize a woman’s period. Two products, Seasonale and Seasonique, come in an 84-pill packet and are taken once a day for 3 months. This means you will only have your period once every 3 months. Another, Lybrel. is designed to be taken every day, eliminating monthly menstruation. Drosperinone, the progestin found in Yasmin and Yaz, has been found to relieve Premenstrual Syndrome (PMS) symptoms in addition to acting as an effective contraceptive hormone.
Levonorgestrel, a progestin, is used in implants that provide effective contraception for up to 5 years after surgical implantation under the skin of the upper arm or inside the uterus. Levonorgestrel implants should be replaced at least once every 5 years. Etonorgestrel implants are effective for 3 years. Implants can be removed at any time, reversing the contraceptive effect. The progestin intrauterine inserts provide effective contraception for about 1 year. The implant and intrauterine systems contain the same hormone found in the mini-pill and are associated with many of the same side effects and precautions as oral contraceptives.
Emergency contraceptives (sometimes referred to as the “morning-after pill”) contain high doses of estrogen and progestin. They are intended for use only after contraceptive failure or unprotected intercourse. They should never be taken by a pregnant woman.
Contraceptive drugs in any form are associated with risks. These risks are greatest in women over age 35 who smoke and have high blood pressure.
Cautions and Warnings
Do not take contraceptives if you are allergic or sensitive to them or any of their ingredients.
The risk of breast cancer may be slightly higher among current and recent users of combination oral contraceptives. This risk appears to decline after contraceptive use is stopped and is gone by 10 years after stopping combination contraceptive products. Breast cancers found in contraceptive users tend to be less advanced than those in non-contraceptive users.
You should not use contraceptive drugs if you are or might be pregnant, have had blood clots in veins or arteries, stroke, any blood-coagulation disorder, known or suspected cancer 0 the breast, sex organs, or liver. Products With more estrogen, or those t43.t jmmdr3higher sustained blood levels of estrogen, such as the contraceptive patch, are more likely to be associated with an increased risk of life-threatening blood clots.
Contraceptive drugs may cause eye lesions. Call your doctor at once if you develop visual difficulties of any kind.
Women taking the combination products Seasonale and Seasonique will have their period only once every 3 months and those taking Lybrel will not have a regular monthly period. It is absolutely essential for you to verify you are not pregnant if you think you may be pregnant for any reason.
The risks of contraceptive drugs increase if you are physically immobile or have asthma; cardiac insufficiency; epilepsy; migraine; kidney problems; a strong family history of breast cancer; benign breast disease; diabetes; endometriosis; gallbladder disease or gallstones; liver problems, including jaundice; high blood cholesterol; high blood pressure; estrogen or progestin intolerance; depression; tuberculosis; or varicose veins.
There is an increased risk of heart attack in women who have used contraceptive drugs for more than 5 years, or who are between age 40 and 49 and have other coronary risk factors such as smoking. obesity, high blood pressure, diabetes, and high blood cholesterol. This risk remains even after the medication is stopped.
Smokers in their mid-30s or older who use contraceptive drugs are 5 times more likely to have a heart attack than nonsmokers taking contraceptives and 10-12 times more likely to have a heart attack than nonsmokers who do not use the pill. Death due to circulatory disease also increases substantially in smokers taking contraceptive drugs, especially in women at least 35 years old. The risk of stroke is also increased in this group. Heavy smokers (more than 15 cigarettes a day) should not use hormonal contraceptives.
Women with a history of headaches, high blood pressure, or varicose veins should avoid estrogen-containing products, as Should older women and those who have experienced estrogen side effects.
Contraceptive drugs may mask the onset of menopause. Progestin-only products are associated with an increased risk of blood-clotting problems.
The progestin in Yasmin and Yaz raises blood potassium levels. Women with kidney, liver,,Dy adrenal gland disease should use eittlp_C pIrjdUcj with caution.
Intrauterine inserts have been associated with an increased risk of pelvic inflammatory disease (PID). The highest risk usually occurs within the first 20 days after insertion. Do not use intrauterine inserts if you have had an ectopic pregnancy.
Toxic Shock Syndrome has been associated with tampons, some barrier contraceptives, and the vaginal ring, although there is no proof that the product was the cause of the infection.
Possible Side Effects
♦ Common: Common side effects often result from using a product that is poorly suited to your body chemistry. Determining the right amount and type of hormone often minimizes these effects. If you are taking too much estrogen, you may experience nausea, bloating, high blood pressure, migraine, excess cervical mucous, skin discoloration, colon polyps, water retention, and swelling, or breast fullness or tenderness. Too little estrogen may cause early or mid-cycle breakthrough bleeding, spotting, or reduced periodic flow. Too much progestin is associated with weight gain and increased appetite, tiredness or fatigue, low periodic flow, acne, depression, breast regression, and androgen-related side effects (acne, oily scalp, hair loss, or excess hair growth). Too little progestin may cause late breakthrough bleeding, excessive periodic bleeding, or missed periods.
✓    Less common: abdominal cramps, infertility after discontinuance of the drug, breast tenderness, weight change, headache, rash, vaginal itching and burning, general vaginal infection, nervousness, dizziness, depression, cataracts, changes in sex drive, hair loss, and increased sensitivity to the sun.
✓    Rare: Women who use contraceptive drugs are more likely to develop several serious conditions, including blood clots in the deep veins, stroke, heart attack, liver cancer, gallbladder disease, and high blood pressure. Women who smoke cigarettes are at much higher risk for some of these adverse effects. Contact your doctor if you experience any side effect not listed above.
brug Interactions
•    Ampicillin, barbiturates, bexarotene, bosentan, carbamazepine, chloramphenicol, efavirenz, fluconazole, griseofulvin, ketoconazole, neomycin, nelfinavir, nitrofuratoin, oxcarbazepine, phenylbutazone, phenytoin, penicillin drugs, protease inhibitor drugs for HIV, rifampin, rifapentine, statin drugs (atorvastatin and rosuvastatin), St. John’s wort, sulfa drugs, tetracycline products, and sedatives can make all contraceptive drugs less effective. Use backup birth control while taking these medications together.
•    Contraceptive drugs may elevate blood levels of benzodiazepine sedatives and sleeping pills (midazolam, lorazepam, oxazepam, and temazepam), caffeine, cyclosporine, imatinib, metoprolol, corticosteroids, theophylline drugs, tizanidine, triptan-type migraine drugs, and tricyclic antidepressants, increasing the risk of side effects. Discuss mixing these medicines with your doctor. Dosage reductions may be needed.
•    Contraceptive drugs may increase the toxic liver effects of acetaminophen and reduce the drug’s effectiveness. Contraceptive drugs may increase or decrease the effect of anticoagulant (blood-thinning) drugs. Discuss the risks of this combination with your doctor.
•    Mycophenolate interferes with only those contraceptives that contain levonorgestrel (Alesse, Aviane, Lessina. Levora, Levlite, Lutera, Lybrel, Mirena, Nordette, Norplant II, Portia, Plan B, Seasonale, Seasonique, and Triphasil). Backup contraception is recommended.
•    Exenatide may reduce the effectiveness of contraceptive pills.
Take them at least 1 hour before an injection of exenatide.
•    Contraceptive drugs may reduce the effectiveness of clofibrate for elevated blood triglycerides, sulfonylurea drugs for diabetes, ursodiol for gallbladder disease, and pain relievers, including salicylates (aspirin).
•    Contraceptive drugs may increase blood-cholesterol levels and interfere with blood tests for thyroid function and blood sugar.
•    Acetaminophen may increase blood levels of ethinyl estradiol, a common contraceptive drug ingredient, increasing side effects and reducing contraceptive effectiveness.
•    Since Yasmin and Yaz raise blood potassium levels, nether should be used if you ate taking spironolactone or anD)ftr potassium-sparing diuretic, potassium supplements, angiotensin-converting enzyme (ACE) inhibitors, angiotensin receptor antagonists, aldosterone antagonists, heparin, non-steroidal anti-inflammatory drugs (NSAIDs), or other medications on a long-term basis that may further increase potassium levels.
•    Contraceptive drugs may interfere with the effects of insulin
for diabetes.
•    Acitretin interferes with the contraceptive effect of progestin-
only mini-pills. It is not known if it also interferes with combination contraceptive drugs.
Food Interactions
None known. Usual Dose
Single-Phase, 2-Phase, and 3-Phase Combinations: The first day of bleeding is day 1 of the menstrual cycle. Beginning on the first day of the cycle, take 1 pill a day for 20-21 days according to the number of pills supplied by the manufacturer. If menstrual flow has not begun 7 days after taking the last pill, begin the next month’s cycle of pills. Some manufacturers recommend starting the pills on a Sunday to make it easy to remember to take them. In this case, start taking your pills on the first Sunday after your period begins. If menstruation begins on a Sunday, take the first pill that day.
Seasonale: Take 1 pink tablet every day for 84 consecutive days. Do not skip a day. Then, take 1 white pill a day for 7 days. Then, start a new pill cycle. You may be pregnant if you do not have a period while you are taking the white pills.
Seasonique: Take 1 light blue-green tablet containng levonorgestrel and ethinyl estradiol daily for 84 consecutive days, followed by 7 days of ethinyl estradiol tablets. Do not stop if spotting or breakthrough bleeding occurs. Report prolonged bleeding to your doctor.
Progestin-Only Mini-Pill: Take 1 pill every day.
Contraceptive Patch: Apply a new patch to the thigh, abdomen, or arm. Remove the patch after 3 weeks and then reapply a new patch after 1 week. Be sure to always apply a new patch on the same day of the week. If you are switching from birth control pmts, apply the first patch on the same day you would start a new cycle of pills.
Vaginal Ring: Keep the vaginal ring in the vaginal canal for 3 weeks. Remove it and put a new one in 1 week later. If you did not use a hormonal contraceptive in the previous month, insert the ring between day 1 and day 5 of your cycle.
If you are switching from a combination birth control pill, insert the ring anytime during the week after you took your last pill but before you would have started your next cycle of pills. No additional contraception is necessary.
If you are switching from a mini-pill, insert the ring on the day after you take your last mini-pill.
If you are switching from a progestin implant or an IUD, insert the ring on the same day your implant or IUD is removed.
If you are switching from a progestin injection, insert the ring on the same day you would have received your next injection.
If you are switching from a progestin-only mini-pill, implant, injection, or IUD, use another form of contraception for the first 7 days after you insert the ring.
Emergency Contraception: Emergency contraceptive kits have only a few pills. They should be taken with a full meal. Take half the pills (1 or 2 depending on the brand you use) within 72 hours of unprotected sex, however they are most effective when taken within the first 24 hours. Take the rest of the pills 12 hours after the first dose. Emergency contraceptives reduce the risk of pregnancy by 75%.
The pregnancy test in the kit can be used to determine if you became pregnant earlier in your cycle or during a previous cycle. If the test is positive, consult your doctor before taking emergency contraception. If you vomit within one hour of taking either dose, contact your doctor.
Overdosage
An overdose may cause nausea and withdrawal bleeding in adult women. Overdose victims should be taken to a hospital emergency room. ALWAYS bring the prescription package.
Special Information
Use backup birth control to prevent pregnancy in the first 3 weeks after you begin taking contraceptive drugs.
Contraceptive drugs do not protect against sexually transmitted diseases.
VM your pill at the same time each day to establish a routine and ensure maximum contraceptive protection.
Call your doctor immediately if you experience severe abdominal pain; severe or sudden headache; pain in the chest, groin, or leg, especially the calf; sudden slurring of speech; changes in vision; weakness, numbness, or pain in the arms or legs; coughing up of blood; loss of coordination; or shortness of breath. These symptoms may require emergency treatment.
Other problems that may require medical attention are bulging eyes; changes in vaginal bleeding; fainting; frequent or painful urination; a gradual increase in blood pressure; breast lumps or secretions; depression; yellowing of the skin or whites of the eyes; rash; redness or irritation; upper abdominal swelling, pain, or tenderness; an unusual or dark-colored mole; thick, white vaginal discharge; or vaginal itching or tenderness.
See your doctor for a check-up every 6-12 months.
Some manufacturers include 7 inert or iron pills in their packaging to be taken on days when the drug is not taken. This makes it easier for women to stay on schedule with their pills. The 7 pills bridge the gap between contraceptive cycles and allow women to take 1 pill every day without stopping.
For single- or 2-phase combinations: If you forget to take a pill for 1 day, take 2 pills the following day. If you miss 2 consecutive days, take 2 pills for the next 2 days. Then return to your schedule of 1 pill a day. If you miss 3 consecutive days, do not take any pills for the next 7 days and use another form of contraception; then start a brand new cycle.
Seasonale: The risk of pregnancy increases with each pink tablet you forget. Use another method of non-hormonal backup contraception any time you miss 2 or more pink tablets until you have taken a pink tablet every day for 7 consecutive days. You are protected against pregnancy if you miss 1 or more white tablets, as long as you begin taking the pink tablets again on the proper day.
Seasonique: The risk of ovulation and pregnancy increases with each forgotten light blue-green pill. If you miss 1 light blue-green pill, take it as soon as you remember and take the next pill at your regular time. This may mean you will take 2 pills on the same day. You don’t need to use a backup birth control method if you forget only 1 pill. If you forget 2 light blue-green pills in a row, take 2 pills on the day you remember and take 2 pills the ReYA day. -Then go back to taking 1 pill a day MMI you finish your pack. If you miss 2 01 MbreYight blue-green pills in a row, you must use non-hormonal backup contraception until you have taken a light blue-green pill daily for 7 days in a row. If you miss 1 or more yellow tablets, you are still protected against pregnancy provided you begin taking light blue-green pills again on the proper day.
For 3-phase combinations: If you forget to take a pill for 1 day, take 2 pills the following day. If you miss 2 consecutive days, take 2 pills for the next 2 days. Then return to your schedule of 1 pill a day. If you forget to take a pill for 3 days in a row, stop taking the drug and use an alternate means of contraception until your period starts. ALWAYS use a backup contraceptive method for the remainder of your cycle if you forget even 1 pill of a 3-phase combination.
If you forget to apply the contraceptive patch on the same day of the week once every 4 weeks, you risk a loss of effectiveness on the days after you should have applied it. If the patch comes off or is partially detached in mid-cycle, you must start a new 3-week cycle at once by removing the old patch and applying a new one.
If the vaginal ring is accidentally expelled during the 3 weeks it is normally retained, rinse it off with water and replace it within 3 hours. Do not use hot water. If the ring is not reusable, insert a new ring and continue with your regular schedule. If you do not replace the ring within 3 hours, its effectiveness may be reduced. If you are in week 3 of the cycle, throw the ring away; you may insert a new one immediately, which will begin a new 3-week cycle and cause you to skip a period. Or, you may wait a week, during which time you will have periodic bleeding, and insert a new ring no later than 7 days after the vaginal ring was expelled. This option should be chosen if you had used the ring for 7 days in a row before it was expelled.
If, when it is expelled, you are in week 1 or 2 of your cycle and the ring is out for more than 3 hours, reinsert it and use an additional form of contraceptive until the ring has been worn for 7 consecutive days. A vaginal ring may break and then slip out or cause discomfort. Throw the ring away if this happens.
Missing a pill reduces your protection. If you keep forgetting to take your pills, you must use another birth control method.
If you take drugs that reduce the effectiveness of contraceptive drugs (see “Drug Interactions”), use a backup contraceptive method during that cycle to PMNeiA accidental pregnancy.
GOOD tlL:Inlal hygiene is essential while taking contraceptive drugs. See your dentist regularly and brush and floss carefully because contraceptive drugs may increase the risk of an oral infection.
Contraceptive drugs may increase your sensitivity to the sun.
Wearing contact lenses may be uncomfortable while taking contraceptive drugs because the pills can cause minor changes in the shape of your eyes.
All contraceptive prescriptions come with a “patient package insert.” Read it thoroughly as it gives detailed information about the drug and is required by federal law.
Special Populations
PregnancylBreast-feeding., Contraceptive hormones cause birth defects and may interfere with fetal development. They are not safe for use during pregnancy. If you think you are pregnant, use another form of contraception and stop taking your birth control pills.
Contraceptive hormones pass into breast milk. Combination contraceptive products reduce the amount of milk produced. Nursing mothers who must use any of these drugs should use infant formula.
Seniors: These products are not intended for women who have completed menopause.

Generic Name
Clotrimazole (kloe-TRIM-uh-zole) 0
Brand Name Mycelex
The information in this profile also applies to the following drug:
Generic Ingredient: Sertaconazole Ertaczo
Type of Drug Antifungal.
Prescribed For
Fungal infections of the mouth, skin, and vaginal tract.
General Information
clotrimazole is useful against a variety of fungal organisms that other drugs do not affect. The exact way in which clotrimazole works is unknown. Sertaconazole is used for athlete’s foot in people age 12 and older with compromised immune systems.
Cautions and Warnings
Do not use this product if you are allergic or sensitive to any of its ingredients.
If clotrimazole causes local itching or irritation, stop using it. Do not use clotrimazole in your eyes.
Proper diagnosis is essential for effective treatment. Do not use this product without first consulting your doctor.
Possible Side Effects
Side effects are infrequent and usually mild.
Cream and Solution
V Most common: redness, stinging, blistering, peeling, itching, and swelling of local areas.
Vaginal Tablets
♦ Most common: mild burning, rash, mild cramps, and frequent urination. Your sexual partner may also experience some burning or itching.
Lozenges
V Most common: stomach cramps or pain, diarrhea, nausea, and vomiting.
Drug Interactions
None known.
Food %%ractions
The oral form of clotrimazole is best taken on an empty stomach, at least 1 hour before or 2 hours after meals. However, you may take it with food as long as you allow the lozenge to dissolve fully in your mouth.
Usual Dose
Topical Cream and Solution
Adult and Child (over age 2): Apply to clean, dry, affected areas morning and night for 7 consecutive days or as needed. For athlete’s foot and ringworm, use daily for 4 weeks. For jock itch, use daily for 2 weeks.
Vaginal Cream
Adult: 1 applicator’s worth at bedtime for 3-7 consecutive days.
Vaginal Tablet
Adult: 1 tablet inserted into the vagina at bedtime for 3 days, or 2 tablets a day for 3-7 consecutive days.
Lozenge
Adult and Child (over age 3): 1 lozenge 5 times a day for 2 weeks or more.
Overdosage
Little is known about the effects of clotrimazole overdose or accidental ingestion. Call your local poison control center for more information. If you seek treatment, ALWAYS bring the prescription bottle or container.
Special Information
If treating a vaginal infection, you should refrain from sexual activity. Call your doctor if burning or itching develops or if the condition does not improve within 7 days.
If you are using the vaginal cream, you may want to wear a sanitary napkin to avoid staining your clothing. Do not use a tampon during treatment.
Dissolve the lozenge slowly in the mouth. This may take up to 30 minutes.
This medicine must be taken on consecutive days. If you forget a dose of oral clotrimazole, take it as soon as you remember. Do not double your dose.
When using clotrimazole for skin infections, do not cover the area with any kind of bandage unless directed to do so by your doctor. For athlete’s foot, wear well-fitting, ventilated shoes, and change your socks at least once a day.
clotrimazole is not effective on scalp or nails.
Special Populations
Pregnancy/Breast-feeding: Women who are or might be pregnant should talk to their doctor about the medication’s risks and benefits. Women who are in the first 3 months of pregnancy should use this drug only if directed to do so by their doctor. If you are pregnant, your doctor may want you to insert vaginal tablets by hand rather than use a vaginal applicator.
It is unknown whether the drug passes into breast milk. Use with caution or use infant formula.
Seniors: Seniors may use this medication without special precaution.

Generic Name
Clozapine (KLOE-zuh-pene) 03
Brand Names
Clozaril    FazaClo Orally Disintegrating Tablets
Type of Drug  Antipsychotic.
Prescribed For  Severe schizophrenia.
General Information
Clozapine is a unique antipsychotic that has the capacity to treat people who do not respond to or cannot tolerate other drugs. It works by a mechanism that differs from those of other antipsychotic drugs.
A very small number of people who take clozapine develop a rapid drop in their white-blood-cell count, known as agranulocytosis. This effect usually reverses itself when the drug is stopped, but the drug must be stopped as soon as it is discovered. An unusually large number of people who have developed clozapine algllaTwlocytosis in the United States are of Eastern European Jewish descent, but the association is not very strong. Most cases of agranulocytosis occur between week 4 and week 10 of treatment. It is essential that blood samples be taken approximately every week and for 4 weeks after the drug is stopped to watch for this effect. Because of the risk of agranulocytosis, clozapine should not be tried until at least 2 other antipsychotic medicines have failed.
Some people taking antipsychotic drugs develop tardive dyskinesia, a potentially irreversible condition marked by uncontrollable movements. Tardive dyskinesia has not been seen in patients taking clozapine, a major advantage of this drug over other antipsychotic medicines. However, there is still a risk that this set of symptoms could occur with clozapine.
Cautions and Warnings
Do not take clozapine if you are allergic or sensitive to any of its ingredients.
Women, seniors, people with serious illnesses, those who are emaciated. those with a history of diseases affecting the white blood cells, or those who are taking other medication that could affect white blood cells may be more susceptible to clozapine agranulocytosis.
Clozapine has been associated with increased mortality in seniors with dementia or Alzheimer’s disease. The specific causes of death related to clozapine and other atypical antipsychotic drugs were either due to a heart-related event or infection, mostly pneumonia. Clozapine should not be taken by those with dementia-related psychosis.
About 5% of people taking the drug experience a seizure in the first year of treatment. Seizure is most likely to occur at higher drug doses.
People with heart disease should be carefully monitored while on clozapine because of possible cardiac risks.
Clozapine may cause low blood pressure, especially at the beginning of therapy.
Clozapine has been associated with obesity, high cholesterol, high blood sugar, and diabetes. Diabetics and pre-diabetics (people with elevated blood sugar and a family history of diabetes) should be carefully monitored.
A serious set of side effects, known as neuroleptic malignant syndrome (NMS), includes a high lever and has been associated With clozapine when it is used together with lithium or other drugs. The symptoms that constitute NMS include muscle rigidity, mental changes, irregular pulse or blood pressure, increased sweating, and abnormal heart rhythm. NMS is potentially fatal and requires immediate medical attention.
Use this drug with caution if you have glaucoma, prostate
problems, or liver or kidney disease.
clozapine may interfere with mental or physical abilities because of the sedation it usually causes during the first few weeks
of treatment.
Possible Side Effects
✓    Most common: rapid heartbeat, low blood pressure, dizziness, fainting, drowsiness or sedation, salivation, and constipation.
✓    Less common: headache, tremor, sleep disturbance, restlessness, slow muscle motions, absence of movement, agitation, convulsions, rigidity, restlessness, confusion, sweating, dry mouth, visual disturbances, high blood pressure, nausea, vomiting, heartburn or abdominal discomfort, fever, and weight gain.
♦    Rare: agranulocytosis (symptoms include fever with or without chills, sore throat, and sores or white spots on the lips or mouth), tardive dyskinesia (symptoms include lip smacking or puckering, puffing of the cheeks, rapid or wormlike tongue movement, uncontrolled chewing motions, and uncontrolled arm and leg movements), and NMS (see “Cautions and Warnings”). Other rare side effects can occur in almost any part of the body. Contact your doctor if you experience any side effect not listed above.
Drug Interactions
•    Clozapine’s anticholinergic effects—blurred vision, dry mouth, and confusion—may be enhanced by interaction with other anticholinergics, such as tricyclic antidepressants like amitriptyline.
•    Drugs that reduce blood pressure may enhance the bloodpressure-lowering effects of clozapine.
•    Alcohol and other nervous system depressants, including benzQUIQOmrn and other antianxiety drugs, may enhance clozapine’s sedative action. At least 1 person has died as a result of combining diazepam and clozapine.
•    Combination contraceptive drugs may increase blood levels of clozapine leading to toxic side effects. Women starting on a combination contraceptive may need to have their clozapine dose adjusted.
•    Clozapine should not be used with ritonavir.
•    Cimetidine, caffeine, citalopram, ciprofloxacin, erythromycin, and ketoconazole may increase blood levels of clozapine resulting in increased side effects. Caution should be used with combining clozapine with paroxetine, fluvoxamine, or sertraline as similar reactions may occur, although these interactions are less well-defined.
•    Clozapine may increase blood levels of digoxin, warfarin, heparin, and phenytoin.
•    Use of clozapine with phenytoin, carbamazapine, and rifampin may cause decreases in blood levels of clozapine, reducing its effectiveness.
•    The combination of lithium and clozapine may cause seizures, confusion, and NMS (see “Cautions and Warnings”).
•    Cigarette smoking may alter clozapine dosage requirements.
•    Combining selective serotonin receptor inhibitors (SSRls) with clozapine may require a lower clozapine dosage.
Food Interactions None known.
Usual Dose
Tablets
Starting dose: 25 mg in divided doses twice a day; maintenance dose    generally, 300-450 mg a day in divided doses. Dosage may be increased gradually to a daily maximum of 900 mg in divided doses if required.
Orally Disintegrating Tablets
Starting dose: 12.5 mg once or twice a day increasing to 300450 mg a day in divided doses by the end of 2 weeks. Dosage may then be increased up to 900 mg a day in divided doses if required.
Overdosage
Symptoms of overdose are delirium, drowsiness, changes in heart rhythm, unusual excitement, nervousness, restlessness, hallucinations, excessive salivation, dizziness or fainting, slow or irregular breathing, and coma, Overdose victims must be taken to a hospital emergency room immediately. ALWAYS bring the prescription bottle or container.
Special Information
Clozapine may cause a fever during the first few weeks of treatment. Generally, the fever is not important, but it may occasionally be necessary to stop treatment due to a persistent fever.
Regular blood tests are necessary to monitor blood composition for any changes that might be caused by clozapine.
Call your doctor at once if you develop lethargy or weakness, a flu-like infection, sore throat, feelings of ill health, fever, sweating, muscle rigidity, mental changes, irregular pulse or blood pressure, mouth ulcers, or dry mouth that lasts for more than 2 weeks.
Dry mouth, a common side effect of clozapine, may be countered by using gum, candy, ice, or a saliva substitute such as Orex or Moi-Stir.
Do not stop taking clozapine without your doctor’s knowledge and approval, because a gradual dosage reduction may be necessary to prevent side effects.
Avoid alcohol or any other nervous system depressants while taking clozapine.
Some of the side effects of clozapine    drowsiness, blurred vision, and seizures—may interfere with the performance of complex tasks like driving or operating hazardous equipment.
While taking clozapine, rapidly rising from a sitting or lying position may cause you to become dizzy or faint.
If you take clozapine twice a day and forget a dose, take it as soon as you remember. If it is almost time for your next dose, take 1 dose as soon as you remember and another in 5 or 6 hours, then go back to your regular schedule. If you take clozapine 3 times a day and forget a dose, take it as soon as you remember. If it is almost time for your next dose, take 1 dose as soon as you remember and another in 3 or 4 hours, then go back to your regular schedule. Never take a double dose.
Orally disintegrating tablets should be left in the unopened blister until time of use. They should not be pushed through the foil. Just prior to use, peel the foil from the blister and gently remove the orally disintegrating tablet. Immediately place the tablet in the mouth, allow it to disintegrate and then swallow with saliva. No water is needed.
Special Populations
Pregnancy/Breast-feeding: This drug Should be used during PM Only if your doctor determines that it is absolutely necessary.
clozapine may pass into breast milk. Nursing mothers who must take this drug should use infant formula.
Seniors: Seniors may be more sensitive to the side effects of clozapine, such as dizziness on rapidly rising from a sitting or lying po-sition, confusion, and excitability. Older men are also more likely to have prostate problems, a reason to be cautious with clozapine. Seniors with psychosis due to dementia who take clozapine are more likely to die from heart disorders and infections than those not taking it.

Generic Name
Codeine (KOE-deep) 0
Brand Name
Only available in generic form.
The information in this profile also applies to the following drugs: Generic Ingredient: Fentanyl
Actiq Lozenge on a Stick    Fentora Buccal Tablet
Duragesic (Patch)    lonsys (Patch)
Generic Ingredient: Morphine Sulfate 10
Avinza    Oramorph SR
Kadian    RMS Suppositories
MS Contin    Roxanol MSIR
Generic Ingredient: Oxycodone Hydrochloride RE
Combunox    OxyFAST
Endocodone    OxylR
M-Oxy    Percolone
OxyContin    Roxicodone Oxydose
Generic Ingredient: Oxymorphone Opana
Type Q( UTUg  Narcotic.
Prescribed For
Mild to severe pain, breakthrough cancer pain, and cough. Long-acting narcotics are meant only for people with chronic pain. Also prescribed for pain and anxiety in pediatric burn patients.
General Information
Codeine relieves pain and suppresses cough. The pain-relieving effect of 30-60 mg of codeine is equal to approximately 650 mg, or 2 tablets, of aspirin. Codeine may be less effective than aspirin for pain associated with inflammation because aspirin reduces inflammation and codeine does not. Codeine suppresses the cough reflex but does not cure the underlying cause of the cough. Other narcotic cough suppressants are stronger pain relievers, but codeine remains the best cough medication available.
Morphine sulfate is a pure narcotic that has been in use for many years. In addition to pain relief, morphine’s effects include drowsiness, mood changes, breathing difficulty, slowed movement of the gastrointestinal tract, nausea, vomiting, and changes in the endocrine and autonomic nervous systems. Morphine sulfate liquid, immediate-release tablets, and suppositories must be taken several times a day. The medication they contain is released immediately for absorption into the bloodstream. Extended- and controlled-release morphine products are designed to release some of the narcotic right away and the rest over a 24-hour period, allowing for less-frequent dosage.
Fentanyl is a potent pain reliever that can be substituted for other narcotic drugs. The patch form, which must be replaced about every 3 days, delivers fentanyl to the bloodstream at a steady rate. The lozenge has a shorter length of action than any other narcotic pain reliever, which makes it useful when given to children before surgery because it provides doctors with the flexibility to obtain maximum benefit with minimal side effects. The lozenge on a stick is used for breakthrough cancer pain as a booster for people already taking narcotic pain relievers. These forms should only be used under controlled circumstances because of the risk of side effects or overdose. Low dosages of fentanyl relieve pain—larger amounts cause loss of consciousness and breathing difficulties.
Oxycodone is a narcotic used to control moderate to severe pain. Most people take it together with aspirin (Percodan) or acetaminophen (Percocet), but it can be used by itself. This is a potent pain reliever that carries a risk (31 addiction with continued use.
Cautions and Warnings
Do not take narcotics if you are allergic or sensitive to any of their ingredients.
Long-term use of narcotics may cause drug dependence or addiction.
Use narcotics with extreme caution if you suffer from asthma or other breathing problems.
Narcotics may make it difficult to monitor the progress of people who have suffered head injuries and acute abdominal conditions.
Actiq contains fentanyl in an amount that can be fatal to children. Keep used and unused lozenges and lozenges on a stick out of reach of children.
Possible Side Effects
♦    Most common: lightheadedness, dizziness, sleepiness, nausea, vomiting, appetite loss, and sweating. If these occur, ask your doctor about lowering your dosage. Most of these side effects disappear if you lie down.
♦    Less common: euphoria (feeling “high”), headache, agitation, uncoordinated muscle movement, minor hallucinations, disorientation and visual disturbances, dry mouth. constipation, flushing of the face, rapid heartbeat, palpitations, faintness, urinary difficulties or hesitancy, reduced sex drive or impotence, itching, rash, anemia, lowered or raised blood sugar, and yellowing of the skin or whites of the eyes. Narcotic analgesics may aggravate convulsions in those who have had them.
More serious side effects of codeine are shallow breathing or breathing difficulties.
Drug Interactions
•    Avoid combining narcotics with alcohol, sleeping medications, sedatives, other depressant drugs, or non-prescription drugs that have alcohol as an ingredient. Alcohol speeds the release of morphine from Avinza. The mixture can result in a deadly narcotic overdose.
•    Narcotic analgesics should not be used at the same time as monoamine oxidase inhibitor antidepressants. Separate usage by at least 14 days.
•    Combining a narcotic pain reliever with an anticholinergic medication may result in severe constipation.
•    Combining a narcotic pain reliever with any other medication that lowers blood pressure can lead to excessive blood-pressure lowering. Avoid this combination.
•    Combining cimetidine with a narcotic pain reliever may cause confusion, disorientation, breathing difficulties, and seizure.
•    Reserpine, rifampin, and remifentanil may decrease the pain-relieving effects of morphine.
•    Fentanyl should be used with caution with azole antifungals (e.g. ketoconazole).
Food Interactions
Codeine may be taken with food to reduce upset stomach. Morphine capsules and the fentanyl patch may be used without regard to food.
Usual Dose
Dosing of narcotic pain medications is highly individualized based on patient tolerance and response to medication.
Codeine
Adult: 15-60 mg every 4-6 hours for relief of pain; 10-20 mg every few hours as needed to suppress cough.
Child: 1 mg per lb. of body weight every 4-6 hours for relief of pain; 2.5-10 mg every 4-6 hours to suppress cough.
Fentanyl Lozenge and Lozenge on a Stick
Adult: 200-1600 mcg. Dosage may be repeated up to 4 times daily. Allow the lozenge to dissolve in your mouth. DO NOT CHEW. Child: not recommended.
Fentanyl Patch: Apply to a clean and non-irritated patch of skin as directed, usually once every 3 days.
Morphine Extended-release and Controlled-release
Tablets and Capsules
Adult: 1-3 capsules a day, depending on the specific product and individual need.
Morphine Oral Liquid and Immediate-release Tablets Adult: 5-30 mg every 4 hours.
Morphine Suppositories
Adult: 5-30 mg several times a day.
Oxycodone
Adult: 10-30 mg every 4 hours as needed. OxyContin should be swallowed whole and not broken.
Child: not recommended.
Overdosage
Symptoms include breathing difficulties or slowing of respiration, extreme tiredness progressing to stupor and then coma, pinpointed pupils, no response to pain stimulation, cold and clammy skin, slowing of heartbeat, lowering of blood pressure, convulsions, and cardiac arrest. The victim should be taken to a hospital emergency room immediately. ALWAYS bring the prescription bottle or container.
Special Information
Codeine is a respiratory depressant and affects the central nervous system (CNS), producing sleepiness, tiredness, or inability to concentrate. Be careful when driving or doing any task that requires concentration. Avoid alcohol.
Call your doctor if you develop breathing difficulties, constipation, dry mouth, or any bothersome or persistent side effect.
Apply the fentanyl patch only to non-irritated skin on a flat surface of the upper body. Hair at the application site should be clipped or cut, not shaved, before applying the patch. Do not use oils, soaps, lotions, alcohol, or anything else that might irritate the skin before applying the patch.
If you are taking a controlled-release narcotic product, do not crush, chew, or break the tablet or lozenge. Rapid release may result in a potentially fatal dose of the drug.
If you forget a dose of codeine, take it as soon as you remember. If it is almost time for your next dose, skip the one you forgot and continue with your regular schedule. Never take a double dose.
Special Populations
Pregnancy/Breast-feeding: Narcotics pass into the fetal circulation. Excessive use of them during pregnancy may cause drug dependence in newborns. Narcotics may also cause breathing difficulties in infants during delivery. Animal studies show that codeine may cause fetal harm. If given to a pregnant woman before cesarean section, fentanyl may cause drowsiness in newborns. When either of these drugs is considered crucial by your doctor, its potemt(a1 bel)elft must be carefully weighed against its risks.
Narcotics pass into breast milk. Nursing mothers who must take codeine should use infant formula.
Seniors: Seniors are more likely to be sensitive to side effects and should be treated with the smallest effective dosage.

Generic Name
Brimonidine (brim-ON-ih-dene) (9
Brand Name  Alphagan P
Type of Drug Alpha agonist.
Prescribed For
Glaucoma and ocular hypertension (high pressure inside the eye).
General Information
Brimonidine tartrate stimulates alpha-2 receptors in the eye and lowers pressure there. The maximum effect occurs 2 hours after the drops are administered. Brimonidine reduces the amount of aqueous humor (liquid) produced inside the eye and increases the rate at which fluid flows out of the eyeball. That portion of brimonidine that finds its way into the bloodstream is broken down by the liver.
Cautions and Warnings
Do not use brimonidine if you are allergic or sensitive to any of its ingredients.
People with kidney or liver disease should use this drug with caution. People with cardiovascular disease should exercise caution with this medication because it can affect blood pressure. It should be used with caution in people with depression, cerebral or coronary insufficiency, and Raynaud’s disease. Brimonidine may cause fatigue, drowsiness, and dizziness or fainting when rising from a sitting or lying position.
Brimonidine’s effectiveness may decrease over time. Your doctor should check your eye pressure periodically to make sure the drug is still working.
Possible Side Effects
✓    Most common: dry mouth; redness, burning, and stinging of the eye: headache; blurred vision; sensation of something in the eye; drowsiness; and eye allergy and itching.
♦    Common: staining or erosion of the cornea, unusual sensitivity to bright light, eyelid redness or swelling, eye pain or ache, dry eye, respiratory symptoms, dizziness, eye irritation, upset stomach, weakness, abnormal, and muscle
✓    Less common: crusty deposit on the eyelid, eye bleeding, abnormal taste sensation, sleeplessness, eye discharge, high blood pressure, anxiety, depression, heart palpitations, dry nose, and fainting.
Drug Interactions
•    Brimonidine may enhance the effects of alcohol, barbiturates, sedatives, anesthetics, beta-blocking drugs, blood-pressurelowering drugs, and cardiac glycosides.
•    Tricyclic antidepressants can increase the breakdown of brimonidine.
e    Do not combine brimonidine with monoamine oxidase inhibitor antidepressants.
Usual Dose
Adult and Child (age 2 and older): 1 drop in the affected eye every 8 hours, 3 times a day.
Child (under age 2): not recommended.
Overdosage
Little is known about the effects of accidental ingestion. Victims should be taken to a hospital emergency room for treatment. ALWAYS bring the prescription bottle or container.
Special Information
If you wear soft contact lenses, wait at least 15 minutes between the time you put the drops in your eye and when you put your lenses in.
To prevent possible infection, do not allow the dropper to touch your fingers, eyelids, or any surface. Wait at least 5 minutes before using any other eyedrops.
Brimonidine may make you drowsy. Be careful while driving or doing anything else that requires concentration while you are taking this drug.
It is important that brimonidine be used according to your doctor’s directions. If you forget to administer a dose of brimonidine, do so as soon as you remember. If it is almost time for your next dose, skip the dose you forgot and continue with your regular schedule. Do not take a double dose.
Special Populations
Pregnancy/Breast-feeding: A small amount ,31 brimonidine may 1pa’SSWAOThe circulation of the fetus. Pregnant women should use this drug with care.
It is not known if this drug passes into breast milk. Nursing mothers who must use this drug should consider using infant formula.
Seniors: Seniors may use brimonidine without special precaution.

Bosentan
Type of Drug     Endothelia receptor antagonist.
Prescribed For
Pulmonary arterial hypertension.
General Information
These drugs lower blood pressure by working on the endothelin system. Endothelia is a hormone that plays an important role in maintaining blood pressure. It is normally found in blood vessels, but endothelin levels are very high in the blood and lungs of people with pulmonary arterial hypertension. People with this condition have high blood pressure, trouble breathing, and get very tired even when walking or doing other moderate exercising. Pulmonary arterial hypertension can be fatal.
Cautions and Warnings
These drugs should not be used by those who are allergic or sensitive to any of their ingredients.
Bosentan can cause liver injury. People taking these drugs should have their liver enzymes checked monthly. Enzyme increases can be a sign of liver injury and may be a reason to stop taking bosentan.
These drugs are broken down in the liver. People with liver damage should take them with caution.
These drugs should not be taken during pregnancy as they are likely to cause birth defects (see “Special Populations”).
These drugs cause a reduction in red blood cells, leading to anemia. Larger doses of bosentan cause a greater loss of red blood cells.
Possible Side Effects
Ambrisentan
Most side effects are mild. Only stuffy nose increases with increased dosage.
V Most common: swelling k%) -aims or legs, stuffy nose, si1)u6fis, flushing, heart palpitations, abdominal pain, constipation, difficulty breathing, and headache.
Bosentan
♦ Most common: headache and sore throat and nose.
Drug Interactions
•    It is possible that bosentan may cause failure of hormonal contraceptives.
•    Cyclosporine, used to prevent transplant rejection, increases blood levels of bosentan and ambrisentan. Do not combine these drugs.
•    Mixing glyburide, an antidiabetes drug, with bosentan increases the risk of elevated liver enzyme levels. Do not combine these drugs.
•    Ketoconazole greatly increases blood levels of bosentan by slowing its breakdown in the liver.
•    Combining bosentan with a statin-type cholesterol - lowering drug such as simvastatin, lovastatin, or atorvastatin reduces the amount of statin drug in the blood. Dose increases may be needed.
•    Bosentan can reduce the amount of warfarin in the blood by
about 1/3. Changes in warfarin dosage may be needed.
•    Combining ambrisentan with atanazavir, clarithromycin, indinavir, itraconazole, ketoconazole, nelfinavir, ritonavir, omeprazole, saquinavir,or telithromycin may increase the amount of ambrisentan in the blood. Caution is advised.
•    Combining ambrisentan with rifampin may reduce the
amount of ambrisentan in the blood. Caution is advised.
Food Interactions
These drugs may be taken with or without food.
U’Suk Dose
Ambrisentan
Adult (age 18 and over): 5-10 mg once a day. Do not crush, split, or chew these tablets.
Child: not recommended.
Possible Side Effects (continued)
♦    Common: flushing, abnormal liver blood pressure, and heart
♦    Less common: upset stomach, tiredness.
ver function, leg swelling, palpitations.
, swelling, itching, anemia,
Bosentan
Adult (age 18 and over): 62.5 mg twice a day for 4 weeks, then
125 mg twice a day.
Child: not recommended.
Overdosage
Massive overdose may result in severe lowering of blood pressure, requiring emergency attention. The most common effects associated with overdosage are headache, low blood pressure, increased heart rate, and nausea and vomiting. Overdose victims should be taken to a hospital emergency room for treatment. ALWAYS bring the prescription bottle or container.
Special Information
Do not stop taking these drugs without gradually reducing the dosage as instructed by your doctor.
If you forget to take a dose, take it as soon as you remember. If it is almost time for your next dose, skip the dose you forgot and continue with your regular schedule. Do not take a double dose.
Contact your doctor at once if you develop severe itching, yellowing of the skin or eyes, tiredness, swelling in the arms or legs, nausea, vomiting, fever, or abdominal pain.
Doctors must enroll in special restricted distribution programs before they can prescribe these medicines, because of the risks of liver injury and birth defects associated with them. These medicines are not available in regular pharmacies but are mailed to you from a central pharmacy only after the testing and other program requirements have been met by your doctor.
Special Populations
Pregnancy/Breast-feeding: These medicines are very likely to cause major birth defects and should not be taken by pregnant women. Women must be sure they are not pregnant before beginning these treatments.
Women should also use non-hormone contraceptives while on these drugs. Hormone-based contraceptives such as birth control pills, injections, and implants may not work in women taking Wst m or ambrisentan.
It is not known if either of these medicines passes into breast milk. Nursing mothers should use infant formula.
Seniors: The greater chance of kidney, liver, and cardiac function side effects in seniors may affect drug dosage. Seniors may also experience more swelling in the arms or legs.

Bisphosphonates (bis-FOS-fun-ates)
Brand Names
Alendronate Sodium Fosamax
Alendronate Sodium  Cholecalciferol Fosamax Plus D
Etidronate Disodium (9 Didronel
lbandronate Sodium Boniva
Risedronate Sodium 91 Ar.Wm~
Risedronate Sodium  Calcium Carbonate Actonel with Calcium
Tiludronate Disodium Skelid
Prescribed For
Prevention and treatment of osteoporosis (a condition characterized by loss of bone mass due to calcium depletion) in postmenopausal women and in older men; Paget’s disease of bone; and high blood calcium associated with high dosages of corticosteroid treatments and cancer.
General Information
Bisphosphonates have been used for many years to treat a variety of conditions associated with low bone mass caused by calcium depletion. They work on cells called osteoclasts that normally break down bone tissue, making bones stronger by preventing loss of bone mass. In osteoporosis, bones become weak and brittle, increasing the risk of spine, hip, and other bone fractures that are a major cause of death and disability in older women. Etidronate has been used occasionally in children, but these drugs generally are not considered safe for use in children.
Cautions and Warnings
Do not use any bisphosphonate if you are allergic or sensitive to any of its ingredients.
Do not use bisphosphonates if you have severe kidney disease or active stomach or intestinal disease such as difficulty swallowing, ulcers, or stomach irritation. Notify your doctor if you experience any gastrointestinal problems while taking bisphosphonates.
Osteonecrosis of the jaw (ONJ), a condition in which bones of the jaw lose their blood supply and eventually collapse, has been reported in people treated with bisphosphonates. Most cases of ONJ have been in cancer patients having dental procedures such as tooth extractions. People at risk may be those with cancer and those taking corticosteroids or those with poor oral hygiene.
Do not use ibandronate, alendronate, or risedronate it you cannot stand or sit upright for 30 minutes (see “Special Information”).
Bisphosphonates can cause low blood calcium and should not be used by people whose blood calcium is already low.
Bisphosphonates can cause severe and sometimes incapaciating bone,    muscle pain.
Possible Side Effects
Side effects are generally mild and similar to those reported by people taking an inactive placebo (sugar pill).
Possible Side Effects (continued)
Alendronate
♦    Most common: pain.
✓    Common: abdominal pain and discomfort, gas, stomach ulcers, and back pain.
✓    Less common: upset stomach, constipation, diarrhea, nausea, difficulty swallowing, muscle pain, headache, flu-like symptoms, accidents, and swelling in the arms or legs.
♦    Rare: vomiting and changes in taste. Contact your doctor it you experience any side effect not listed above.
Etidronate
✓    Most common: fever.
✓    Common: nausea, excess fluids, and flu-like symptoms.
♦    Less common: convulsions, constipation, inflammation of the lining of the mouth, changes in liver function, low blood levels of magnesium or phosphate, breathing difficulties, and changes in sense of taste.
✓    Rare: allergic reactions. Contact your doctor if you experience any side effect not listed above.
lbandronate
✓    Most common: upper respiratory infection, back pain, bronchitis, and upset stomach.
♦    Common: arm or leg pain, muscle pain, headache, pneumonia, and urinary infections.
✓    Less common: dizziness, fainting, pain due to nerve lesions, weakness, allergic reactions, diarrhea, vomiting, dental problems, stomach pain, low blood cholesterol, joint problems, arthritis, and sore throat.
✓    Rare: eye problems have occurred with other drugs in this group but not with ibandronate. Contact your doctor if you experience any side effect not listed above.
Risedronate
✓    Most common:    qlaftea, abdominal pain, rash, and severe joint pain.
✓    Common: chest pain, dizziness, swelling in the arms or legs, constipation, nausea, sinus irritation, and bone pain.
✓    Less common: leg cramps, weakness, bronchitis, poor vision in one eye, dry eyes, ringing or buzzing in the ears, Possible Side Effects (continued)
parathyroid gland problems, infection, rash and other skin problems, tooth problems, and vitamin D deficiency.
♦    Rare: fatigue and drug reactions, including swelling of the
tongue and throat with difficulty breathing, generalized rash,
and some blisters. Contact your doctor if you experience
any side effect not listed above.
Tiludronate
♦    Most common: diarrhea and nausea.
✓    Common: headache, upset stomach, respiratory infection, runny nose, fluid in the lungs, and sinus irritation.
✓    Less common: vomiting, dizziness, tingling in the hands or feet, coughing, sore throat, gas, aches and pains, cataracts, eye redness, glaucoma, rash, skin disorders, tooth problems, swelling, infection, vitamin D deficiency, and muscle aches.
♦    Rare: tiredness, high blood pressure, fainting, appetite loss, constipation, abdominal pain, and sleeplessness. Contact your doctor if you experience any side effect not listed above.
Drug Interactions
•    Antacids, calcium, and iron-containing supplements and foods can interfere with the absorption of bisphosphonates. Separate doses of these drugs and foods and a bisphosphonate by at least 30 minutes.
•    Separate doses of tiludronate and aluminum-containing antacids by 1 hour.
•    Aspirin can interfere with the absorption of tiludronate.
•    Indomethacin can increase the amount of tiludronate absorbed into the blood by 2-4 times.
•    Bisphosphonates may increase the gastrointestinal-irritating effects of aspirin, ibuprofen, and other NSAWDs.
•    Drugs that reduce the amount of stomach acid, including ranitidine, cimetidine, and omeprazole, may increase the amount of ibandronate in the blood, but the degree of increase is not clinically important.
•    Etidronate may affect the action of warfarin.
•    Bisphosphonates reduce the ability of teriparatide to build new bone.

Food Interactions
Take these medicines with plain water. Food and drink—even mineral water, orange juice, or coffee—interfere with the absorption of these drugs. Take alendronate or risedronate every morning at least 30 minutes before eating, drinking, or taking other medications. Etidronate should be taken on an empty stomach 2 hours before a meal. lbandronate should be taken as soon as you wake up and 1 hour before you eat or take any other medications, vitamins, or supplements. Tiludronate should be taken when you first wake up; wait 4 hours before eating breakfast.
Usual Dose
Alendronate
10-40 mg a day; or 35-75 mg once weekly. not recommended.
Alendronate + Calcium
70 mg/2800 IU once weekly. not recommended.
Etidronate
up to 4.5 mg per lb. a day to start, gradually increasing to no more than 9 mg per lb. per day.
not recommended.
lbandronate
2.5 mg.once a day: or one 150 mg tablet once a month. not recommended.
Risedronate
5-30 mg a day; or 35 mg once weekly. not recommended.
Tiludronate
400 mg a day.
not recommended.
Overdosage
Little is known about the effeckS,zA USP*nosphonate overdose.
Other symptoms include upset stomach, heartburn, ulcer, and irritation of the esophagus. Milk or antacids may reverse these effects. These drugs can irritate the esophagus. Do not let the victim lie down or vomit. Overdose victims should be taken to a hospital emergency room. ALWAYS bring the prescription bottle or container.
Special Information
Food interferes with the effectiveness of these drugs. Carefully follow the directions in “Food Interactions” above.
Do not suck on any of these tablets or allow them to dissolve in your mouth because they can cause mouth sores.
To reduce the risk of stomach and throat irritation, do not lie down for at least 30 minutes after taking alendronate or risedronate. Do not lie down for 60 minutes after taking ibandronate.
Separate doses of calcium, iron, and vitamin D supplements from those of a bisphosphonate by at least 2 hours. If you forget a dose, take it as soon as you remember. If it is almost time for your next dose, skip the dose you forgot and continue with your regular schedule. If you forget a morning dose and take it later in the day, you must still follow the instructions in “Food Interactions” about avoiding food.
Special Populations
Pregnancy/Breast-feeding: Bisphosphonates cause abnormal bone development in animal fetuses and are toxic to pregnant animals. When any of these drugs is considered crucial by your doctor, its potential benefits must be carefully weighed against its risks.
It is not known if bisphosphonates pass into breast milk. Since these drugs affect bone formation, nursing mothers who must take a bisphosphonate should use infant formula.
Seniors: Seniors may use these drugs without special restriction.

butobarbitone A barbiturate of medium clisityand rapidity of onset.
Dose: 60-200 mg. (Soneryl).
cabergoline A dopamine similar to bromocriptine, but with a longer .1, 1 ioli.
Dose: for suppression of lactation I mg, followed by doses of 0.25 ing for 2 days. Nausea, dizziness and breast pain are side effects. (Cabaser; Dostinex).
cadexomer iodine A modified starch powder containing 0.9% of iodine in a slow release form. It is used as an antiseptic application for venous ulcers and pressure sores. It should not be used during prenancy or lactation, during thyroid investigations or in patients sensitive to iodine. (lodosorb).
caffeine The central nervous system stimulant present in tea and coffee. It is used with paracetamol and other mild analgesics.
calamine Zinc carbonate. It has a mild astringent and soothing action and is widely used as Calamine Lotion for skin irritation and as Oily Calamine Lotion in eczema.
calciferol (vitamin D 2) form of vitamin 1) used in the prophylaxis and treatment of deficiency states such as rickets in children and osteomalacia in adults, and in other bone disorders. Dose: prophylactic 800 units daily; therapeutic 5000-50 000 units daily. In resistant rickets and parathyroid deficiency, higher doses may be required, but such therapy requires care, as hypercalcaemia percalcaernia and irreversible renal damage may occur. See ako alfacalcidol and calcitriol.
calcipotriol An analogue of vitamin D with a selective inhibitory action on the proliferation of keratinocytes. Used in the treatment of psoriasis as a 0.005% cream or ointment twice a day. Not more than 100 g/week. (Dovonex).
calcitonin Pork-derived calcitonin is a hormone that has an action similar to that
of the parathyroid gland in regulating blood calcium levels. It is used in the hypercalcaemia associated with malignancy, and in osteoporosis. It is also of value in Paget’s disease of bone, in which it relieves bone pain and reduces the neurological symptoms.
Dose: 10-160 units daily by s.c. or i.m. injection according to need and response. In Paget’s disease, prolonged treatment for some months may he required. Side-effects are nausea, flushing and paraesthesia, and local reactions may also occur. (Calcynar; Calcitare; Miacalcic). See salcatonin.
calcitrol The metabolite formed in the kidney from calciferol. It is the most powerful and rapidly acting metabolite with vitamin L) activity. It is of value in chronic renal deficiency states when the normal metabolism of calcium and phosphorus is impaired, as in renal osteodystrophy. Dose: 1-2 pg daily under biochemical control. Side-effects, such as hypercal-
caemia and hypercalciuria, are usually , P
reversible on withdrawing the drug. (Rocaltrol).
calcium channel blocking agents The movement of calcium ions through the calcium channels of the myocardium plays an essential role in cardiac activity. The inhibition of such movement by channel blocking agents reduces myocardial contractility and lowers the tone of the cardiovascular system. Such a reduction is of value in angina, hypertension and cardiac arrhythmias, and can be obtained by the use of calcium channel blocking agents such as diltiazem, felodipine, isradipine, nicardipine, nifedipine, nimidopine and verapamil. These compounds exhibit certain differences in action and in therapeutic applications, and their use requires care. Nifedipine and veraparail have been used in the prophylactic treatment of migraine. Their side-effects include nausea, oedema, rash and bradycardia. See pages 114 & 148, and Tables 4 & 21.
calcium carbonate A time honoured antacid now used less frequently. It also acts as a phosphate binder, and is used in hyperphosphatacinia.
calcium chloride The calcium salt present In various intravenous electrolyte solutions.

calcium folinate See folinic acid.
calcium gluconate A soluble and well-tolerated calcium salt used in many condi- tions associated with calcium deficiency such &i rickets, coeliac disease and parathyroid deficiency; also during pregnancy and lactation often in association with vitamin D. Calcium gluconate is also given in chilblains, urticaria and allergic reactions. Dose: usually given in (loses of 0.5-2g, but ill hypocalcaemic tetany it is given by slow i.v. injection in doses of 10 ml of a 100% solution, with laboratory control of the blood calcium levels. Calcium gluconate is also given i.v. in the early
treatment of toxic hyperkalaemia.
calcium lactate The calcium salt most commonly given orally in mild deficiency states.
Dose: 1-5 g.
Calcium Resonium An ion-exchange resin that take, up potassium in exchange for calcium. Used in hyperkailatentia associated with anuria and haernodialysis. Should be used only when potassium and calcium serum levels are under biochemical control. Dose: 15- 30g 3 or 4 times a day. In children, 0.5-1 g/kg daily. It is sometimes given as a retention enema.
are given in heart failure. Side-effects include proteinuria, neutropenia, agranulocytosis, rash and loss of taste. (Acepril; Capotin). See ACE inhibitors, page 148 and Table 21.
carbachol A parasympathomimetic agent used orally and by injection in the treatment of postoperative atony and retention of urine, and occasionally as eye drops (3%) in i the treatment ofglaucoma. Dose: 2-4 ing orally, 250 pg by s.c. injection. Side-effects include nausea, bradycardia and colic.
carbamazepine An anticonvulsant effective in all types of epilepsy except petit mat (absence seizures). It is also of value in trigeminal neuralgia and is given prophylactically in manic-depressive states. Dose: 200-400 ing daily initially, slowly increased up to 1.8 g daily if required. Suppositories of 125-250 mg are available. Carbamazepine has some antidiuretic properties, and has been used in diabetes insipidus in doses of 100-2M mg daily. Side-effects include dizziness, gastrointestinal disturbances and all erythematous rash. (Tegretol). See page 136 andTable 15.
carbaryl An insecticide used as it lotion and shampoo in pediculosis.
canrenoate A steroid-derived aldosterone antagonist with the actions and uses of spironolactone.
Dose: given in oedema by slow i.v, inject ion or infusion in doses of 200-400 mg daily. Nausea and vomiting are high-dose side-effects. (Spiroctan-M).
capreomycin An antibiotic of value in resistant i uberculosis or when other drugs are not tolerated.
Dose: I g daily by i.m. injection. It may cause tinnitus, deafness, renal damage and allergic reactions. (Capastat).
captopril An inhibitor of the angiownsin converting enzyme. It is used in the treatment of hypertension, including that resistant to other therapy, but care is necessary as the initial dose may cause marked hypotension, and so is best taken ill bed. It is often given with a thiazide diuretic to improve the response, and with a beta-blacker to maintain the effect. Dose: 25 mg initially, slowly increased, as required, up to 450 mg daily. Similar doses
carbenoxcilone A cytoprotectant derived front liquorice, used for mouth ulcers. (Bioplex; Bioral). See Table 27.
carbidopa An enzyme inhibitor used with ievodopa in parkinsonism. It prevents the breakdown of levodopa, thus permitting a larger amount to reach the brain. See
page 160.
carbimazole An antithyroid drug. It inhibits the formation of thyroxine and is valuable in the treatment of thyrotoxicosis and in preparation for thyroidectomy. Dose: 30-60 mg, daily initially; maintenance dose, 5-20 ing daily. It is sometimes given together with thyroxine it) the’blockage replacement’ treatment of hyperthyroidism. Side-effects are nausea, rash and pruritus; alopecia and agranulcytosis have been reported. (Neo-Mercazole).
carbocisteine A mucolytic agent used to reduce the production and viscosity of sputum in respiratory disorders.
Dose: 1.5 g daily. (Mucodyne).

Allergies and Pregnancy
Great care is taken in prescribing drugs during pregnancy. This is something that doctors are now exceedingly cautious about, but do tell the doctor as soon as you decide to try for a baby. The foetus is most vulnerable to damage by drugs during the first three months, and especially the first few weeks after conception.
Your prescription will be changed if the drugs you are currently taking could pose any threat to the unborn child. A drug that has not had sufficiently rigorous testing for safety during pregnancy, or lacks a long track record, will probably be withdrawn. New drugs are generally considered to be slightly more risky than the tried-and-true older drugs: rare side effects may not come to light during the testing which precedes release of a drug, but they do become apparent once the drug is in widespread use for a long time (see pp. 136-7).
If you are already pregnant as you read this, don’t worry too much. With a few notable exceptions – certain antihistamines and antibiotics – most of the drugs used for allergic diseases do not pose any major risk to the unborn child. There is probably nothing to worry about, but see your doctor as soon as you can – and talk to a pharmacist, in the meantime, if you are concerned. Don’t panic, and don’t stop taking your drugs unless you are absolutely sure that you can do without them. Do not stop taking your drugs if you have asthma.
Some non-prescription medicines are best avoided during pregnancy. Read the packet carefully, and talk to your pharmacist if you have any doubts.
From the moment you start trying for a baby, remember to tell any medical personnel who treat you, and any pharmacist you buy medicines from, that you could be pregnant.
Immunotherapy and skin testing
Immunotherapy should not begin during pregnancy, because of the risk of anaphylaxis (see below), but pregnant women who are already undergoing immunotherapy can continue.
The safety procedures described on p. 166-7 should be followed with meticulous care.
Most doctors continue immunotherapy at a steady ‘maintenance dose’ because there is always a small risk of anaphylaxis with immunotherapy when the dose is increased. Some doctors are even more cautious and reduce the maintenance dose during pregnancy, but give more frequent injections – this minimises the chance of bad reactions.
Many doctors do not give skin tests for allergy during pregnancy, as these also carry a very small risk of anaphylaxis. If you do have skin tests, there must be resuscitation equipment available. Intradermal tests (see p. 92) are best avoided.
Severe allergic reactions (anaphylaxis)
Special care should be taken to avoid anaphylaxis during pregnancy as this may increase the chance of a miscarriage.
Injecting adrenaline during the first three months of pregnancy may carry some small risk of malformation of the baby. But the evidence here is uncertain, whereas the danger to your own life, if you don’t use adrenaline when you need it, is both certain and substantial. If you have an adrenaline self-injection kit, talk to your doctor now about what you should do in an emergency. The best policy is to be ultra-careful about avoiding your allergen, so that anaphylaxis does not happen.
Women who suffer from exercise-induced anaphylaxis (see p. 59) generally play safe by exercising less strenuously while pregnant. The problem can get worse during pregnancy, but it does not usually do so. Labour itself is very strenuous of course, but problems during the birth are uncommon. If anaphylaxis does occur, the reaction is usually quite mild – nettle rash only – and the baby is delivered alive and well. However, many women find that the attacks of exercise-induced anaphylaxis are more frequent and severe when they start exercising again after the baby is born. It is best to resume exercise very gradually.
Eczema and other skin problems
Atopic eczema may improve during pregnancy, probably because the body produces slightly more of its own natural steroid, hydrocortisone. Contact dermatitis may either improve or flare up.
Stretch marks often itch a great deal, and widespread itchy skin, with or without a rash, is a common problem during pregnancy. These are not usually allergic reactions, and no cause can be identified in most cases. The skin tends to recover a few days after the birth.
If there is itching in the vulva) area, this could be due to a Candida infection (your doctor can prescribe a safe treatment) or it might be just another of those unexplained itches of pregnancy.
Hayfever and other nasal allergies
The natural hormone changes of pregnancy affect the nose, which can become more blocked. If you have allergic rhinitis this will add to your woes. See your doctor and make sure that your drug treatment is adequate (see p. 29). The nose-clearing exercises on pp. 230-31 might also help.
Asthma
Severe asthma can be bad for both the pregnant mother and the unborn child. Uncontrolled asthma increases the risk of the baby being born prematurely – and premature babies are more likely to develop asthma themselves. The death rate for newborn babies is also higher if the mother has poorly controlled asthma.
Treating a severe asthma attack promptly helps to prevent any damage to the baby, so don’t hesitate to call an ambulance –and tell the operator you are pregnant. The ambulance should be carrying oxygen which is particularly important for helping the unborn baby through the attack.
If you have asthma, don’t stop using your drugs or reduce the dose unless advised to do so by a doctor. Because it is so important to keep asthma under control during pregnancy, your doctor may want to add, or increase, preventer drugs such as inhaled corticosteroids or sodium cromoglycate (see p. 148). It
also makes sense to monitor your peak flow twice a day (see p. 97) so that you have advance warning of serious attacks.
Unfortunately, some asthmatics – usually those who have severe asthma to begin with – get much worse during their pregnancy. In such cases, careful monitoring and increased use of preventer medicines are essential. The symptoms usually increase from week 24 to week 36 of the pregnancy. The last four weeks tend to be much better, and things are back to normal by about three months after the birth.
Some women with asthma have fewer symptoms while they are pregnant, and for others their asthma stays about the same.
Asthma can also appear for the first time during pregnancy, and may be quite severe. However, a relatively mild breathlessness can be due simply to the fact that, as the pregnancy advances, the chest cavity, and therefore the lungs, become compressed. This is not necessarily asthma.
This simple physical effect can also add to the difficulties experienced by women who were already asthmatic before they became pregnant.
GER (acid reflux) – see p. 38 – can contribute to asthma during pregnancy, and treating this problem may help.
Asthma attacks during the birth
Severe asthma attacks very rarely occur during labour, but it is still important that all the medical staff in attendance know you have asthma. They should also be told if you have taken steroid tablets during the previous two years. A record of when you took steroids, how long for, and at what dose, will be valuable. You may need a low dose of steroid to get you through the physical stress of labour (see p. 142). Some doctors believe that patients who have been using high-dose inhaled steroids should be treated in the same way.
Smoking
Smoking is a bad idea if you have allergies or any allergic tendency in the family. Smoking is a very bad idea indeed if you are pregnant, or a parent. This is the moment, if ever there was one, to give up.
Enlist your doctor’s help, and ask if counselling, psychotherapy or other forms of support are available. If you have tried all this before, and failed, then talk to your doctor about the possibility of using nicotine patches. Some doctors believe that, for pregnant women who smoke 20 cigarettes or more a day, the advantages of nicotine patches outweigh the risks to the foetus. Nicotine levels in the blood are lower with patches than with heavy smoking, and your baby is not enduring the hundreds of other toxins found in cigarette smoke.

Skin-prick tests
This is an indirect method of detecting true allergic reactions. It is one of a family of skin tests that use a similar approach. The three different tests in this family are known as: skin-prick tests or prick tests, puncture tests, and scratch tests.
For the skin-prick test - the technique used in Britain - a small drop of liquid containing an allergen, such as grass pollen, is placed on the arm. The doctor makes a small prick in the skin, under the drop of liquid, allowing a minuscule amount of the allergen to get into the skin. A positive reaction is recorded if a red bump develops soon afterwards. For accuracy, the bump must be compared to positive and negative controls (see below).
The puncture method is very similar to the skin-prick test but uses a slightly different technique for breaking the skin. The term prick-puncture test covers both techniques.
With the scratch method, the skin is scratched lightly, and the allergen solution is then applied over the scratch. This method gives less consistent results than prick-puncture testing.
It is important to include a negative control in the test - a skin-prick test with plain salt water (saline). This should not produce much of a bump - if it does, the skin is clearly over-reactive and the tests more difficult to assess. The doctor should also include a positive control - a skin-prick test with histamine, the substance that plays a central role in allergic reactions. This should always produce a bump. If it does not, the skin is decidedly under-reactive, and the tests are invalid.
Taking antihistamines will make the skin under-reactive, and you should stop taking them before the testing, for a period ranging from a day to several weeks - it varies depending on the particular antihistamine. Ask your doctor for specific instructions about stopping these and other drugs before testing.
Skin tends to be over-reactive to testing in people with dermatographism (see p. 52). Blood tests for specific IgE,
such as RASTs (see p. 92), are needed for anyone who has this condition. Eczema sufferers with a rash over large areas of the body may also require blood tests, if there is too little clear skin for testing.
Skin-prick tests can produce both false positives and false negatives (see box below). Some allergic diseases will give a lot of false negatives and relatively few false positives, while for others the reverse is true. The allergen itself influences the rates of misleading reactions: for example, tests for soya allergy are notoriously unreliable, whereas those for peanut are far more accurate. The age of the person being tested also makes a difference. With all these influences at work, interpreting the test responses is a real art, and the doctor’s experience counts for a lot.
All sorts of people offer skin-prick tests, including alternative practitioners. Get them done by a qualified doctor, preferably by an allergist, who will know how to make sense of the reactions.
Note that the purpose of these tests, and of blood tests for specific IgE, is to identify the allergens that are bringing on your symptoms, not to predict how strongly you will react to those allergens. The tests may give some indication of the intensity of your reaction, but they cannot be regarded as a good guide to how you will respond to the allergen in the future.
The safety record of skin-prick tests is very good. Occasionally a systemic reaction (anaphylaxis) occurs with these tests, but there are no records of any deaths. Nevertheless, if you suffer from severe asthma or have experienced anaphylactic shock in the past, it is advisable for the doctor to have adrenaline and resuscitation equipment available. Those with strong allergic reactions to latex may also react badly if they are tested with an allergen that cross-reacts with latex (e.g. cypress pollen), not just when tested with latex itself. Taking beta-Mockers (see box on p. 150) increases the risk of a life-threatening reaction for anyone in these higher-risk categories.
False positives and false negatives
Apart from challenge tests, none of the tests used for allergy works with 100% accuracy. Most give both false positives and false negatives.
A false positive means that there is a positive test but no actual reaction when the allergen is encountered (e.g. eaten or inhaled). A false negative means that there is a negative test result despite a genuine reaction (as shown by a challenge test, for example).
A test that gives relatively few false positives has good positive predictive value - in other words, if it suggests you are allergic to something, you probably are.
A test that gives relatively few false negatives has good negative predictive value. If it comes up negative, you are probably not allergic to that allergen.
Some tests for allergic reactions show good positive predictive value but poor negative predictive value, while for other tests the reverse is true.
Fresh is best
The fruit and vegetable allergens that provoke Oral Allergy Syndrome (see p. 63) are chemically unstable, so commercially produced extracts for skin-prick testing quickly lose their potency and give false-negative results. Most allergists now favour using a drop of fresh juice from the fruit or vegetable concerned.
Intradermal tests
These tests (also called ‘intracutaneous tests’) put allergen more deeply into the skin than prick-puncture tests. The skin tends to react more when penetrated to this depth, so there are more false positives. There is also a greater risk of a serious reaction which may require emergency resuscitation. Don’t undergo these tests if you are taking beta-Mockers (see box on p. 150).
Blood tests for IgE
There are blood tests that look at the total amount of IgE (the allergy antibody), which is sometimes useful in diagnosis. But more important are blood tests for specific IgE – against egg or grass pollen or latex, for example. There are different ways of measuring the IgE in the blood, the most commonly used being a radio-allergosorbent test or RAST.
Research shows that RASTs are no more accurate than skin-prick tests in confirming real-life allergic reactions. However, they are useful for patients who can’t discontinue their antihistamines without developing severe symptoms, and for those with dermatographism or very severe eczema (see p. 91).
Patch tests
These tests, used primarily for contact dermatitis, are similar to straightforward challenge tests, because the suspect substances are applied directly to the skin.
The test substances are placed on the skin – usually on your back – in small chambers. They are held in place with sticky tape, and left there for several days. Ideally, the reaction of the skin should be checked three times: after two days, again the next day, and again the day after that. It really is worth going back for all these separate visits, because the accuracy of the test increases greatly with repeated checking.
The substances chosen for testing are a standard set of antigens that most commonly cause contact dermatitis. This standard set will pick up 60-80% of all sensitivity reactions in contact dermatitis. If you have substances that you suspect may be causing symptoms, such as cosmetics, the doctor can usually test for these too.
You should not be tested while you still have a rash, as the testing will probably make the existing rash flare up, even though the test patches are applied well away from the rash.
Use of steroid creams and any light treatments (including exposure of the test area to ordinary sunlight) must stop at least a week before testing starts, or the results will not be accurate.
Interpreting patch tests requires a huge amount of skill, plus extensive knowledge of the finicky details of the different test substances. You need a dermatologist with considerable experience in this area.
False positives (see box on p. 91) can occur, especially if you react very strongly to one of the substances tested – some people develop what dermatologists call an ‘angry back’, and this generates false positives to various other substances being tested at the same time. Should you be told that you are sensitive to a great many different things, you may want to query this reading of the test. Ernest N. Charlesworth, an allergist and dermatologist at the University of Texas, describes patients who ‘develop into environmental cripples’ after being told that they are definitely sensitive to multiple antigens, on the basis of misinterpreted false-positive patch tests.
False negatives (see box on p. 91) are also possible, even with very careful testing. Should this occur, a type of challenge test known as a ROAT (Repeat Open Application Test) is possible. The suspect substance is applied to the inner fold of the elbow twice a day for a week. Get your doctor’s agreement before trying this test.
Endoscopy and biopsy
Miniaturised cameras and sophisticated fibre-optics have allowed modern doctors to do something that their predecessors could never have imagined possible – look right inside the human body. This procedure is called endoscopy, and it has a useful role in a few sensitivity reactions.
Looking inside the sinus cavities can assist in understanding exactly what is going wrong in chronic sinusitis. Inspecting the digestive tract can be valuable in several of the non-IgE immune reactions to food, such as coeliac disease (see p. 70) and eosinophilic gastroenteritis (see p. 72).
A biopsy is often carried out at the same time as endoscopy.
s involves taking a small sample from the affected area, such as
I ning of the gut, and studying it in detail under a microscope.
One purpose of a gut biopsy is to look for characteristic :goes of damage to the lining of the gut – such as the distinctive charges produced by untreated coeliac disease. A biopsy can also reveal what kind of immune cells are present. Abnormal numbers of certain immune cells, for example, eosinophils (see p 19), may suggest a particular diagnosis.
Another way of looking at what kind of immune reactions are going on, used for lung diseases, is a bronchoalveolar lavage – iterally a ‘washing out’ of the airways and lungs, allowing immune cells to be collected and studied. This diagnostic technique is lased for Heiner’s Syndrome (see p. 72).
Tests for food intolerance
The only really effective way of testing for food intolerance is an el ruination diet (see pp. 194-7). This is the gold standard. However, it is neither easy nor quick – which has led to a constant search for alternative tests.
The proposed alternatives are all indirect tests, that is to say, non-dietary. The results of the tests are used as a basis for an avoidance diet. In other words, the foods that give a positive test result are avoided.
Some of these tests use samples of hair or blood, others use pulse testing, pendulums, or muscle strength tests (’applied kinesiology’). A few of these tests do show some promise. Pulse tests, and a blood test called the ‘lymphocyte transformation test’. for example, can give a general indication of sensitivity reactions – sometimes. However, even in the most expert hands, these do not give a result that is accurate enough to be useful.
Of the other tests that are available, most have not been evaluated at all objectively.
Many of them are advertised directly to the public, and one of the problems with this approach is that the testing company starts by assuming that food is the problem. The same is usually true of ‘dietary therapists’ and others in the alternative health field offering tests of this kind.
Almost everyone who undertakes such tests is given a fairly long list of foods which have come up positive in the tests. This does not fit with the evidence from medical trials in which a group of people with irritable bowel or migraine (typical food intolerance symptoms) undertake an elimination diet. A significant proportion of them always find that they do not have food intolerance. Of the rest. many find that they react to one or two foods only. The long lists of foods produced by the commercial tests are, to put it mildly, implausible.
With tests that require a sample of blood, sending off two blood samples from the same person, under different names, is a simple way of assessing the tests’ validity. This exercise has been tried several times with different testing companies, and every time two completely different lists of foods have been sent back.
Covert studies of this kind have also shown that the tests overlook genuine reactions. In one alarming case, a woman with a true allergy to peanuts was assured by a ‘dietary therapist’ that she really could eat peanuts safely.
Many people with food intolerance will tell you that they did well after following a diet based on such tests – and they may well have done. Given that common foods such as wheat and milk are regular offenders in food intolerance, and that these foods very frequently feature on the lists of positive test results generated by commercial testing companies, quite a few people should do well. The problem is that these people may also be avoiding many other foods quite unnecessarily.
Furthermore, if people have sensitivities to some other foods that are not on the list, they will be missing out. They could enjoy a far better level of health if all the foods causing symptoms were Identified and removed from their diet.
In the end, an elimination diet is both cheaper and far more likely to give the right answers.
Testing for IgG antibodies
In diagnosing food intolerance, a few doctors offer tests for a type of antibody called IgG. This antibody is formed to any food molecules that get Into the bloodstream after a meal – and some do, even in entirely healthy people. So finding IgG antibodies to food molecules is not indicative of any disease at all. It occurs in everyone and is perfectly normal.
Nevertheless, some doctors feel that by measuring the level of IgG antibodies to foods, they can get a general idea of the permeability of the gut wall (which might possibly be true) and of particular foods that could be causing intolerance reactions (very doubtful – the tests just tell you what you eat most, and you know that already).
This test does measure something real, unlike some of the alternative tests for food intolerance. But the relevance of what it measures to the health of the individual concerned is partial and indefinite. A recent study of IgG testing for irritable bowel syndrome has confirmed this view.
In short, blood tests for IgG antibodies to food molecules seem like very poor value for money, and potentially misleading, whereas an elimination diet is a far more precise way of pinpointing food intolerances.

Immune reactions to food
`When I finally found someone who could say what was wrong with me, it was such a relief. I can’t tell you how much ill-health and pain and misery I’d had up to that point. I’m immensely grateful to the doctor who sorted the problem out for me. My life has been transformed.’
Richard has eosinophilic gastroenteritis, one of the rarer immune reactions to food. Like all rare diseases, it can escape diagnosis for a long time. IgE (the allergy antibody – see box on p. 12) is sometimes involved in eosinophilic gastroenteritis, but it is not an essential part of the reaction. Those who, like Richard, do not make IgE antibodies to the problem food will not give positive skin-prick tests. For them, the possibility of food being responsible for their symptoms may well be overlooked*.
Another difficulty for patients such as Richard is that most of the non-IgE immune reactions to food affect babies and children exclusively. A few of them can also occur in adults, but this is very rare, so it’s not something that automatically springs to mind when the doctor is searching for a diagnosis.
Eosinophilic diseases
The key event in these diseases is the arrival of large numbers of immune cells called eosinophils (see p. 19) in the walls of the digestive system. If the eosinophils converge on the tube leading down to the stomach (the oesophagus) the disease is called eosinophilic oesophagitis, and the symptoms include reflux (regurgitation) of food, occasional vomiting, refusing food (in babies), stomach pain and disturbed sleep.
If the stomach is the focus for the eosinophils, this is eosinophilic gastritis, and there is vomiting, pain, poor appetite and therefore poor growth. There can also be obstruction of the stomach outlet which may, in a few babies, produce pyloric stenosis (the main symptom is projectile vomiting).
When eosinophils flock to the intestines as well as to the stomach, the disease is called eosinophilic gastroenteritis. In
terms of symptoms, the picture is not much different from the previous condition, but there can be diarrhoea as an additional symptom, and babies may be irritable and puffy in appearance.
These conditions are most common in babies, but sometimes they continue through childhood. Very occasionally they occur in adults too.
Heiner’s Syndrome
This disease affects babies only, and is very rare. It is a severe form of cow’s milk sensitivity leading to wheezing and haemosiderosis (bleeding into the lungs). The child usually seems sickly, growth is slow, and there may be recurrent bouts of pneumonia. A full diagnosis requires blood tests to check for anaemia, examination of sputum under the microscope, and a biopsy or lavage (see p. 92) from the lung. The only effective treatment is to remove cow’s milk from the diet completely. Needless to say, this must be done under full medical supervision.
Other reactions to food
The cause of these diseases is not fully understood, but the immune system is clearly involved.
Dietary protein entero-colitis syndrome
In babies, the symptoms begin with general irritability and vomiting between one and three hours after a feed. Unless the offending food – usually cow’s milk – is withdrawn promptly, there will be bloating, diarrhoea (usually containing blood), anaemia, and poor growth. Older children have similar symptoms, while adults suffer terrible nausea, plus stomach pains and vomiting.
Nickel in food
Nickel and other metals in food may cause immune reactions for those with sensitivity to such metals (see pp. 55-6). The symptoms are usually in the skin, but there can be a few digestive symptoms too.
Dietary protein enteropathy
The main symptom here is diarrhoea, usually very severe. Often babies vomit their feed as well. Most have little appetite, and if the offending food is not withdrawn they suffer from poor growth, anaemia and other signs of malnutrition. This is because damage to the lining of the gut prevents nutrients from being absorbed properly. Older children show similar symptoms.
Dietary protein proctitis
This is a far less severe problem. The babies with this disorder look healthy, but there is inflammation in the bowel and small amounts of blood are passed with the faeces.
Diagnosis
There are two aspects to diagnosis:
• what kind of disease is it?
• what food or foods are causing the reaction?
Your doctor will probably try to answer the first question by looking inside the digestive tract with special equipment (endoscopy) and by taking a small sample – a biopsy (see p. 92).
A blood sample may also be taken to look for raised levels of immune cells and antibodies. Skin-prick tests or RAST tests (see pp. 91-2) will be tried to rule out the possibility of true food allergy – and because IgE may play a small part in these other forms of food sensitivity (in the eosinophilic diseases, for example).
Often the tests yield no very clear answers, especially in babies, and an exact diagnosis is not possible. But failure to answer the first question does not mean that the second question should be ignored. Pinpointing the culprit food or foods is vital.
Identifying the food is easier the younger the child, simply because the range of foods eaten is so much smaller. Cow’s milk is the most common offender when the disease affects young children – particularly bottle-fed babies, since standard infant formula is made with cow’s milk. Your doctor will prescribe an alternative formula (see box on p. 66) for you to try. For older children and adults, an elimination diet will probably be required to identify the food concerned. Among young children, likely offenders include soya, egg, wheat, rice, chicken or fish. A simple elimination diet, similar to that used for atopic eczema (see p. 198) may be adequate. You must have full medical supervision for this.
In the case of eosinophilic reactions, skin-prick tests may help identify the foods concerned, but are usually of limited value, so an elimination diet is again necessary. Where adults are affected by eosinophilic diseases, sensitivity to several different foods is likely, so identifying the offending foods usually requires the most exacting form of elimination diet, using an elemental diet for the exclusion phase (see box on p. 196). The symptoms are very slow to disappear: it can take up to eight weeks of avoiding the foods before your ailing digestive tract recovers. Don’t give up too soon.
Treatment
Avoidance is the only way here. Special infant formula (see box on p. 66) is required for cow’s milk sensitivity in babies.
In the case of eosinophilic reactions, some doctors may use steroid tablets as an additional treatment, just for a few weeks, to get the inflammation under control. Some new studies show that the anti-leukotriene drugs (see p. 149) are very effective for eosinophilic gastroenteritis.
Controversial topics
According to some doctors, a reaction to food may, on rare occasions, produce vasculitis (inflammation of the blood vessels).
Vasculitis itself is a well-recognised condition. The blood vessels are damaged by inflammation, and become more leaky. Symptoms often begin with a general swelling (angioedema), and an outbreak of small red blotches deep in the skin — especially on the legs — where small amounts of blood have escaped. These blotches later turn purplish, then yellow, before fading. This type of rash is known as purpura. Sometimes there are larger emissions of blood, resulting in spontaneous bruising.
Many different conditions can cause vasculitis, but only a few doctors would agree that food sensitivity is one of them. The inflammation could be caused by circulating immune complexes containing food antigens bound to antibodies (see p. 13). There is evidence, in some patients, of a direct effect on the cells called platelets that cause blood to clot.
Equally controversial is the suggestion that food sensitivity can be the cause of trouble for some children with kidney disorders. Some research groups have found that a few children with certain kinds of kidney disease recover on an elemental diet (see box on p. 196). All those affected have a classical allergic disease such as asthma or atopic eczema as well, and they tend to be sensitive to several different foods, plus pollen or other airborne allergens. Circulating immune complexes might be involved here, but no one is sure.
Some cases of food-related rheumatoid arthritis and palindromic rheumatism (see p. 76) could be due to immune complexes involving food molecules becoming deposited in the joints, but it is not the mechanism in all, or even most, of those affected.

Atopic eczema
A Greek word meaning ‘to boil over’ or ‘to erupt’ is the source of the medical term ‘eczema’. It refers, of course, to the way in which the skin erupts into a rash, but it could equally well describe the eruption of controversy around this disease. No other allergic disease is quite such a cauldron of dissent - indeed, even the question of whether it is an allergic disease remains unresolved. These controversies directly affect the treatment of atopic eczema, so it is useful to understand them if you or your child have eczema.
The disagreement begins with the question of what causes atopic eczema.
Let’s start with the one point that everyone agrees on: dry skin plays a fundamental role. Those with atopic eczema have dry skin, not just in the eczematous areas, but in other parts as well, sometimes all over the body. The skin cells are less efficient than normal skin cells at retaining water.
Everyone would also agree that there is inflammation of the skin – a reaction that is produced by the immune system. But when it comes to the question of what starts off the inflammation there are huge differences of opinion among specialists treating atopic eczema – these specialists include dermatologists, allergists and paediatricians.
Since people with atopic eczema are atopic (allergy-prone), and most have
huge amounts of the allergy antibody, IgE, going round in their blood, it might
seem plausible that an allergic reaction to some external item kicks off the
inflammation. And when skin-prick tests (see p. 91) to common allergens such
as house-dust mite are tried, there are usually a large number of positive results.
But many of these turn out to be false positives – when tested more directly,
the allergen concerned does not actually play a part in causing the skin symptoms.
This has led some specialists working with eczema, mainly dermatologists, to
What the words mean
Eczema is not a disease in itself. The word refers to a certain type of reddish rash — a rash which can be caused in a variety of ways. The type of eczema that affects people of an allergic disposition (atopics), is called either atopic eczema or atopic dermatitis.
The word dermatitis just means inflammation of the skin. Most doctors consider it to be synonymous with eczema, but some give it a slightly broader meaning.
believe that allergic reactions play little part in either initiating or perpetuating atopic eczema. In their view, the basic cause of atopic eczema is dry skin and a generally overwrought immune system, not specific allergic reactions.
To some of these doctors, positive skin-prick tests are all false positives in atopic eczema – that is, irrelevant to the disease process. A positive skin-test result, in their opinion, simply indicates that the skin of atopic eczema sufferers is in a highly sensitive state, not that the allergen concerned plays any causative role.
Allergists tend to take a different view of this, as you might expect. And recent research shows that they are correct – allergens often do play a significant part in provoking atopic eczema.
Research using direct challenge tests (see p. 90) has identified some of the things that could provoke such sensitivity reactions:
• house-dust mites, pollen or moulds
• cats, dogs, rabbits and other furry pets
• cow’s milk or other food – a prime suspect in babies and young children (see p. 68). The response to food is usually delayed, occurring some hours after the item is consumed.
With mite, pollen and pet allergens, the eczema symptoms can be provoked either by allergens falling on the skin, or by direct contact (e.g. mite allergens in the bed, skin contact with pets, or lying on grass for those with grass-pollen allergy).
The rash tends to occur on skin not covered by clothes, as you would expect. But it can sometimes occur only on particular exposed areas – usually the most sensitive areas of skin. For example, there are people who react to house-dust mite but have eczema on the eyelids only.
Additionally, experiments show that even when an airborne allergen is only inhaled it can sometimes provoke eczema symptoms. The allergen probably reaches the skin in the bloodstream. (Alternatively, it might provoke an immune reaction in the airways which generates chemical messages of the kind that promote inflammation – these then reach the skin in the blood.) This means that the skin reaction could occur anywhere on the body, not just on exposed skin.
In the case of food, the molecules of food that cause the trouble are probably being absorbed from the stomach without being completely broken down. They then reach the skin via the blood to provoke a reaction there. (Or, again, it could be an inflammatory messenger chemical travelling from the gut to the skin in the blood.)
When food gets directly onto the skin – which it frequently does with small children, of course – it can provoke a reaction that way too. This may be a slow eczema-causing reaction, or a much faster reaction known as contact urticaria (see pp. 50-51). Reacting to food with contact urticaria is quite common in children with atopic eczema – but the same food doesn’t necessarily provoke atopic eczema when it is eaten. (However, eating these foods can sometimes trigger anaphylaxis – see pp. 58-9. They should therefore be treated with great caution.)
At the same time as all this research – which shows for sure that allergens play a part in atopic eczema – others have been asking what actually happens when skin reacts to an allergen. Their studies have turned the accepted understanding of allergies upside-down. They show that when something like egg or pollen provokes atopic eczema, what is occurring isn’t necessarily an allergic reaction of the usual sort, with IgE and mast cells (see
box on p.12). Instead, other immune cells are causing the trouble. Sometimes IgE is involved, but without mast cells. Sometimes neither is involved. These revolutionary discoveries are described in more detail on pp. 18-19. One interesting realisation from this research is that in different eczema sufferers, different immune reactions may be producing the rash – even if they are reacting to the same allergen! This helps to explain why the results of skin tests are so inconsistent and puzzling.
The wandering rash
For a baby with atopic eczema, the face, and especially the cheeks, are commonly affected, but there may be a rash all over the legs, the backs of the arms, and the back. As the months go by, the rash settles on the lower legs, and spreads to the fold of the elbow, and then the fold at the back of the knees — by about three years of age, this flexure eczema is the main problem for most children.
In adults, eczema is often found in quite restricted areas, such as the hands, scalp, lips, eyelids or chest. It may be located around the nipples — a sensitive spot where rubbing by clothing is enough to initiate a rash.
Atopic eczema is always in a process of change, and different parts of the body may display different stages of the rash:
• The rash is red and usually dry at first, and there may be not a great deal to see. In this early stage the visible signs may be minimal, while the itchiness can be colossal. Sometimes there is oozing of clear fluid.
• Occasionally the first phase is more marked, with dense patches of small red bumps or tiny blisters. On the hands, these may merge to form larger blisters.
• Infections tend to change the appearance of the rash (see p. 44).
• With time the skin becomes thicker, paler and scaly. It may form leathery patches (called lichenification), especially if there is habitual scratching or rubbing. This is chronic eczema.
• When the eczema clears, there may be an area of skin that is lighter in colour, or darker, than the surrounding skin.
The next step
Whatever causes atopic eczema, it provokes the most horrendous itching, as every eczema sufferer knows. The itch cries out to be scratched, and scratching is the major cause of the visible rash. If left untouched, the skin does not erupt into eczema, although it may well turn red, and there are still distinct changes in the skin that can be seen with a microscope.
Once eczema has erupted, the skin is no longer an intact protective layer that neatly separates ‘in-here’ from ‘out-there’. The skin becomes more permeable and loses its own natural moisture far more readily, so the dryness gets worse. At the same time allergens and irritants penetrate far more easily, causing yet more inflammation.
Something else compounds the damage: once atopic eczema is established, the immune system starts making IgE antibodies to the body’s own proteins, especially those found in skin cells. This helps explain why atopic eczema can become so severe and so entrenched.
Infections — another vicious circle
When eczema erupts and the skin barrier is breached, infections often become a problem. A regular source of trouble is the bacterium Staphylococcus aureus, a cause of the infection impetigo. This microbe invades eczematous skin far more readily than healthy skin, causing a prolific ooze with golden-yellow crusting.
Staphylococcus aureus produces a toxin known as a ’super-antigen’ which revs up the immune system to even more furious effort. This effort does not, unfortunately, oust the bacteria, but it does make the skin inflammation even worse. To add to their woes, many who are afflicted with atopic eczema start making IgE antibodies against Staphylococcus aureus toxins.
Infection with fungi (yeasts and moulds) is also a problem in atopic eczema (see p. 49), and there may be sensitivity reactions to these fungi.
The herpes virus, responsible for causing cold sores, can also invade eczematous skin, though this is much rarer. It worsens the eczema and produces fever and general weakness. There may also be flocks of small red bumps, each with a tiny dimple or blister at the centre. Any symptoms of this kind indicate that the patient needs urgent treatment.
Irritants and stress
People with atopic eczema are far more susceptible to everyday irritants such as wool and rough synthetic fabrics, soap, and traces of detergent left behind in clothes. Chlorinated water, either in swimming pools or from the tap, can also aggravate the skin, and even ‘hard’ water (found in areas with chalk or limestone bedrock) may be a factor.
Some air pollutants may play a part in atopic eczema. Researchers in Germany have found that children living close to busy trunk roads, or in homes with a gas cooker and no extraction hood (see pp. 128-9), were more likely to develop eczema. Formaldehyde fumes, often found in modern houses (see p. 129), are sometimes a factor when eczema affects the face and hands.