HIV Antivirals
Generic Name
Glatiramer (glah-TYE-ram-er)
Brand Name Copaxone
Type of Drug
Relapsing-remitting multiple sclerosis (MS) therapy.
Prescribed For MS.
General Information
Glatiramer is a mixture of several amino acids. It is thought to work by modifying the immune processes responsible for MS. In studies, people who took the drug for over a year were twice as likely to be relapse-free as those who took a placebo (sugar pill).
Cautions and Warnings
Do not use this drug it you are allergic or sensitive to any of its ingredients or to mannitol.
About 10% of people who self-administer glatiramer experience a post-injection reaction with symptoms that include flushing, chest pain, heart palpitations, anxiety, breathing difficulties, closing of the throat, and an itchy rash. These symptoms usually go away without treatment. This reaction generally occurs after several months of drug therapy, though it may occur earlier.
About 21 % of the people who took glatiramer in drug studies had chest pain, but the exact relationship of this pain to use of glatiramer could not be determined. Report any chest pain to your doctor at once.
Glatiramer may make you more sensitive to sunlight.
Because it interferes with immune response, glatiramer may increase your risk of developing infections and tumors.
Glatiramer may interfere with kidney function.
Possible Side Effects
V Most common: infections, weakness, pain, chest pain, flu-like symptoms, back pain, flushing, heart palpitations, anxiety, muscle stiffness or spasticity, an urgent need to urinate, swollen lymph glands, injection-site reactions
Possible Side Effects (continued)
(including pain, inflammation, itching, an unknown mass at the injection site, welts, skin marks, and bleeding), breathing difficulties, runny nose, and joint pain.
¦ Common: fever, neck pain, facial swelling, bacterial infection, migraine, rapid heartbeat, tremors, fainting, appetite loss, vomiting, general stomach disorders, vaginal infection, painful menstruation, black-and-blue marks, swelling in the arms or legs, bronchial irritation, spasm of the larynx, and ear pain.
V Less common: chills, cysts, agitation, foot drop, nervousness, rolling eyeballs, rapid eye movement, confusion, speech problems, cold sores, redness, itchy rash, skin nodules, stomach pain and irritation, and weight gain.
¦ Rare: Other side effects can occur in almost any part of the body, including the heart and blood vessels, digestive system, blood and lymph systems, muscles and bones, respiratory system, kidney, reproductive system, and eyes. Contact your doctor if you experience any side effect not listed above.
Food and Drug Interactions None known.
Usual Dose
Adult (age 18 and over): 20 mg a day by injection under the skin. Child (under age 18): not recommended.
Overdosage
Little is known about the effects of glatiramer overdose. Call you local poison control center or a hospital emergency room for information. If you seek treatment, ALWAYS bring the prescription bottle or container.
Special Information
This medication is given by injection. For information on how to properly administer this drug, see page 1242.
Store unused glatiramer in the refrigerator before it is mixed with the diluent supplied by the manufacturer. Do not use any other diluent. The mixed injection must be used right away.
Suggested injection sites are the arms, abdomen, hips. and thighs. Be sure to rotate injection sites.
Glatiramer works best if given at the same time each day.
If you forget to administer a dose, 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. Call your doctor if you miss more than 2 doses in a row.
Special Populations
Pregnancy/Breast-feeding: The safety of using glatiramer during pregnancy is not known. When this drug is considered crucial by your doctor, its potential benefits must be carefully weighed against its risks.
It is not known if glatiramer passes into breast milk. Nursing mothers who must take it should use infant formula.
Seniors: Seniors may use glatiramer without special restriction.
Type of Drug
Glitazone Antidiabetes Drugs
(GLIT-uh-zone)
Brand Names
Rosiglitazone Maleate Avandia
Combination Products
Pioglitazone Hydrochloride + Metformin Hydrochloride
ACTOplus Met
Pioglitazone Hydrochloride + Glimepiride Duetact
Rosiglitazone Maleate + Metformin Hydrochloride
Nnndamet
Rosiglitazone Maleate + Glimepiride Avandaryl
Prescribed For Type 2 diabetes.
General Information
The glitazones reduce the amount of sugar produced by the liver and increase insulin sensitivity of muscle, liver, and fat cells. They may also help to control blood-fat levels, which are often elevated in diabetes. Glitazones work by affecting genes responsible for controlling the use of sugar and fat in the body, making cells more sensitive to insulin. They are effective for people with type 2 diabetes, whose cells do not respond well to insulin. Glitazones only work when insulin is present. They do not increase the amount of insulin made in the pancreas. Glitazones can be used alone or combined with other diabetes drugs. Studies have indicated that taking rosiglitazone can delay or prevent type 2 diabetes in people with pre-diabetes.
Cautions and Warnings
Do not take these drugs if you are sensitive or allergic to any of their ingredients or to related drugs. Glitazones may cause fluid retention, worsening or leading to heart failure. Some studies have indicated the risk of heart attack may be increased in people taking rosiglitazone. Other studies have shown that pioglitazone decreases the risk of heart attack. The effects of these drugs on the heart are still being investigated.
Glitazones are broken down in the liver; people with liver disease should not take them. Liver enzyme monitoring is recommended for all people taking a glitazone. People taking pioglitazone and rosiglitazone have experienced liver failure, though no direct causal effect of the drug has been established.
Glitazones may raise blood levels of cholesterol and other blood fats.
These drugs can trigger ovulation. Premenopausal women who are not ovulating may be at risk of becoming pregnant.
Glitazones can cause weight gain, which increases with dosage.
Rosiglitazone may increase the risk of broken bones in the hands, arms, or feet.
Women may achieve maximum benefit with smaller dosages.
Possible Side Effects
Pioglitazone
In studies, the side effects of pioglitazone were about the same as those for a placebo (sugar pill).
Possible Side Effects (continued)
¦ Most common: upper respiratory infections, headaches, and sinus irritation.
? Common: muscle aches, tooth problems, and sore throat.
? Less common: anemia and swollen legs or arms.
¦ Rare: swelling below the surface of the skin, especially around the eyes and lips; yellowing of the skin or whites of the eyes, hepatitis, and liver failure. Contact your doctor if you experience any side effect not listed above.
For additional side effects of ACTOplus Met, see Metformin (page 696). For additional side effects of Duetact, see Sulfonylurea Diabetes Drugs (page 1065).
Rosiglitazone
• Common: upper respiratory infections, accidental injuries, and headache.
• Less, common: swollen legs or arms, back pain.
• Rare: swelling below the surface of the skin, especially around the eyes and lips; may also affect the hands, feet and throat. Also, hives, anemia, blurry or distorted vision, and low blood sugar. Contact your doctor if you experience any side effect not listed above.
For additional side effects of Avandamet, see Metformin (page 696). For additional side effects of Avandaryl, see Sulfonylurea Diabetes Drugs (page 1065).
Drug Interactions
• Mixing gemfibrozil (for very high triglycerides) with a glitazone increases the amount of the glitazone absorbed into the body. A reduction in the dose of the glitazone may be needed if you start taking gemfibrozil.
• Rifampin can reduce the amount of a glitazone that is absorbed by the body, possibly leading to higher blood sugar levels.
• Ketoconazole may significantly increase the amount of pioglitazone in the body. Other drugs that may have a similar effect but have not yet been studied include itraconazole, erythromycin, calcium channel blockers, corticosteroids, cyclosporine, protease inhibitor anti-HIV drugs, tacrolimus, triazolam, and trimetrexate.
• Mixing pioglitazone with atorvastatin may reduce the amount of either drug in the body.
• Pioglitazone may reduce the effectiveness of contraceptive drugs containing norethindrone and ethinyl estradiol. Higher-dose contraceptives or another contraceptive method may be needed.
• Pioglitazone may stimulate the breakdown of other drugs also metabolized in the liver.
• Taking rosiglitazone and insulin may increase the risk of fluid retention and heart failure.
For additional drug interactions for Avandamet and ACTOpius Met, see Metformin (page 696). For additional drug interactions for Avandaryl and Duetact, see Sulfonylurea Diabetes Drugs (page 1065).
Food Interactions
Grapefruit juice may interfere with the breakdown of pioglitazone in the liver. Otherwise, these drugs may be taken with or without food, except for Avandaryl, which should be taken with the first meal of the day.
Usual Dose
Adult
Pioglitazone: 15-45 mg once a day.
Rosiglitazone: 8 mg once a day or in divided doses. ACTOplus Met: 15/500 mg-45/2550 mg once or twice a day. Avandamet: 2/500 mg-4/1000 mg twice a day.
Avandaryl: 4/1 mg-8/4 mg with the first meal of the day. Duetact: 30/2 mg-30/4 mg once a day.
Child: not recommended. Overdosage
Little is known about the effects of glitazone overdose. Take the victim to a hospital emergency room. ALWAYS bring the prescription bottle or container.
ISID’atial Information
Diet, calorie control, exercise, and weight loss are essential to controlling type 2 diabetes. Do not depend solely on this drug to manage your condition.
Alcohol, smoking, age, and race do not affect the way that glitazones are processed in the body.
Call your doctor if you develop symptoms Of liver disease, including nausea, vomiting, abdominal pain, fatigue, appetite loss, or dark-colored urine.
See your doctor for regular monitoring of blood sugar, glycosylated hemoglobin (a more sensitive indicator of long-term diabetes control), and liver function.
If you forget a dose of any of these medicines, 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.
Special Populations
Pregnancy/Breast-feeding: The safety of using glitazones during pregnancy is not known. Most experts recommend that diabetes be controlled with insulin during pregnancy.
It is not known if glitizones pass into breast milk. Nursing mothers who must take it should consider using infant formula.
Seniors: Seniors may take this drug without special restriction.
Generic Name
Guanabenz (GWAN-uh-benz) 9)
Type of Drug Anti hypertensive.
Prescribed For High blood pressure.
General Information
Guanabenz acetate works by depressing the central nervous system by stimulating certain receptors. Initially, guanabenz reduces blood pressure without a major effect on blood vessels; however, btAqAum use of guanabenz may result in the dilation (widening) of blood vessels and a slight slowing of pulse rate. Guanabenz may be taken alone or with a thiazide diuretic.
Cautions and Warnings
Do not take guanabenz if you are allergic or sensitive to any of its ingredients.
People with severe kidney or liver disease should take this drug with caution. Guanabenz should also be used with caution by people who have had a recent heart attack or stroke.
Drug Interactions
• Other blood-pressure-lowering agents such as beta blockers increase the effect of guanabenz.
• The sedating effects of guanabenz are increased by combining it with sedatives, sleeping pills, or other centralnervous-system (CNS) depressants, including alcohol.
• People taking this drug for high blood pressure should avoid over-the-counter drugs that might aggravate their condition, including decongestants, cold and allergy remedies, and diet pills—all of which may contain stimulants.
Food Interactions
This drug is best taken on an empty stomach, but it may be taken with food if it upsets your stomach.
Usual Dose
Adult: 4 mg twice a day to start, increased gradually to a maximum dose of 32 mg twice a dwy—though doses this large are rarely needed.
Child (under age 12): not recommended.
Overdosage
Overdose causes sleepiness, lethargy, low blood pressure, irritability, pinpoint pupils, and reduced heart rate. Overdose victims should be made to vomit with ipecac syrup—available at any
swollen effects increase with dosage. siness, sedation, dry mouth, dizziness, ache.
st pain; swelling in the hands, legs, or ns or abnormal heart rhythms; stom- pain or discomfort; nausea; diarrhea; ion; anxiety; poor muscle control; de- sleeping; stuffy nose; blurred vision; ains; breathing difficulties; frequent uri- sex drive; impotence; unusual taste in ollen and painful breasts in men.
Possible Side Effects
Risk and severity of sid
• Most common: drowsiness
and headache. • Less common: ches
heart palpitation
• or abdominal vomiting; constipation
difficulty muscle aches and pains
• decreased the mouth; and
pharmacy—but call your doctor or poison control center first. If you must go to a hospital emergency room, ALWAYS bring the prescription bottle or container.
Special Information
Take guanabenz exactly as prescribed for maximum benefit. If any side effect becomes severe or intolerable, contact your doctor.
Guanabenz often causes tiredness or dizziness; avoid alcohol because it increases these effects. Take care when driving or doing anything that requires concentration.
Do not stop taking guanabenz without your doctor’s approval. Suddenly stopping this drug may cause a rapid increase in blood pressure. Dosage must be gradually reduced by your doctor.
If you forget a dose, 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. Do not take a double dose. Call your doctor if you miss 2 or more consecutive doses.
Special Populations
PregrianCylBreast-feeding, Guanabenz may affect the fetus. ii should be avoided by women who are or might be pregnant. When guanabenz is considered crucial by your doctor, its potential benefits must be carefully weighed against its risks.
It is not known if guanabenz passes into breast milk. Nursing mothers who must take this drug should use infant formula.
Seniors: Seniors are more sensitive to the sedating and bloodpressure-lowering effects of guanabenz.
Generic Name
Haloperidol (hal-oe-PER-ih-dol) [M
Brand Name
Haldol Type of Drug .
Butyroqhv)mearibpsychotic.
Prescribed For
Psychotic disorders, including Tourette’s syndrome; severe behavioral problems in children; short-term treatment of hyperactive children; chronic schizophrenia; vomiting; treatment of acute psychiatric situations; and phencyclidine (PCP) psychosis.
General Information
Haloperidol is one of many nonphenothiazine agents used to treat psychosis. These drugs are equally effective when given in therapeutically equivalent doses. The major differences are in the type and severity of side effects. Some people may respond well to one and not at all to another. Haloperidol acts on a portion of the brain called the hypothalamus. It affects parts of the hypothalamus that control metabolism, body temperature, alertness, muscle tone, hormone balance, and vomiting. Haloperidol is available in liquid form for those who have trouble swallowing tablets.
Cautions and Warnings
Haloperidol should not be used by people who are allergic or sensitive to any of its ingredients.
People with very low blood pressure, Parkinson’s disease, or blood, liver, heart, or kidney disease should avoid this drug.
If you have glaucoma, epilepsy or a history of seizures, ulcers, or difficulty urinating, haloperidol should be used with caution and under strict supervision of your doctor.
If haloperidol is used to control mania in bipolar disorder, a rapid depressive mood swing may occur.
Haloperidol can upset the body’s temperature-regulating mechanism creating a risk for heat stroke or dehydration.
Haloperidol may cause dystonia, tardive dyskinesia, or neuroleptic malignant syndrome, all serious conditions.
Possible Side Effects
V Most common: drowsiness, blurred vision, constipation, diarrhea, dizziness, dry mouth, headache, loss of appetite, nausea, stomach pain, or sleeplessness.
V Less common: jaundice (yellowing of the whites of the eyes or skin), which may occur in the first 2-4 weeks. The jaundice usually goes away when the drug is discontinued, but there have been cases in which it did not. if gou notice this effect, develop fever, or generally feel unwell, contact your doctor immediately. Other less common side effects are changes in components of the blood, including anemias; raised or lowered blood pressure; abnormal heartbeat; restlessness; anxiety; euphoria (feeling “high”); depression; confusion; acne-like skin reactions; excessive salivation;
Possible Side Effects (continued)
breast engorgement; development of breast tissue in males; vomiting; excessive sweating-, menstrual irregularities; impotence; and breathing difficulties.
¦ Rare: neurological effects such as spasms of the neck muscles, severe stiffness of the back muscles, rolling back of the eyes, convulsions, difficulty in swallowing, and symptoms associated with Parkinson’s disease. These effects usually disappear after the drug has been withdrawn; however, symptoms of the face, tongue, or jaw may persist for years, especially in seniors with a long history of brain disease. If you experience any of these effects, contact your doctor immediately. 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
• Be cautious about taking haloperidol with barbiturates, sleeping pills, narcotics or other sedatives, tricyclic antidepressants, alcohol, or any other medication that may produce a depressive effect.
• Combining haloperidol with carbamazepine may decrease the effectiveness of haloperidol requiring a dosage adjustment.
• The use of azole antifungal agents (e.g. ketoconazole) may cause an increase in haloperidol side effects, possibly requiring adjustments in haloperidol doses.
• Anticholinergic drugs may reduce the effectiveness of haloperidol and increase the risk of side effects.
• Severe low blood pressure or heartbeat irregularities may occur if haloperidol is combined with epinephrine or dopamine.
• Taking lithium together with haloperidol may lead to disorientation, loss of consciousness, ry uncontrolled muscle Mwments.
• Combining fluoxetine with haloperidol may increase the effects of haloperidol.
• Haloperidol may increase the effects of antihypertensive drugs.
• Haloperidol may affect phenytoin levels, as well as levels of
other antipsychotic drugs.
• Careful dosage monitoring is required if haloperidol is taken
with rifampin.
Food Interactions
Haloperidol is best taken on an empty stomach, but you may take it with food if it upsets your stomach.
Usual Dose
Psychotic disorders
Adult: starting dose-0.5-2 mg 2 or 3 times a day. Some patients may need 3-5 mg 2 or 3 times a day. Rarely, some patients may require up to 100 mg a day.
Child (age 3-12 or 33-88 lbs.): starting dose-0.5 mg a day. Dosage may be increased in 0.5-mg steps every 5-7 days. Child (under age 3): not recommended.
Tourette’s syndrome
Adult: starting dose 0.5-1.5 mg 3 times a day; up to 10 mg a day may be needed.
Child (age 3-12 or 33-88 lbs.): 0.02-0.03 mg per lb. a day. The same dosages apply to children with behavioral disorders or hyperactivity.
Overdosage
Symptoms of overdose are depression, extreme weakness, tiredness, desire to sleep, coma, lowered blood pressure, uncontrolled muscle spasms, agitation, restlessness, convulsions, fever, dry mouth, and abnormal heart rhythm. The patient should be taken to a hospital emergency room immediately. ALWAYS bring the prescription bottle or container.
Special Information
This medication may cause drowsiness. Use caution when driving or operating hazardous equipment; also, avoid alcoholic beverages while taking it.
Haloperidol may cause unusual sensitivity to the sun. It may aIF4Q WVR your urine reddish-brown or pink.
If dizziness occurs, avoid sudden changes in posture and avoid climbing stairs.
Avoid extreme heat while taking haloperidol. This medication may make you more prone to heat stroke.
If you forget to take a dose of haloperidol, take it as soon as you remember. Take the rest of the day’s doses evenly spaced throughout the day. Do not take a double dose.
Special Populations
Pregnancy/Breast-feeding: Serious problems have been seen in pregnant animals given large amounts of haloperidol. Although haloperidol has not been studied in pregnant women, you should avoid this drug if you are or might be pregnant.
Haloperidol passes into breast milk. Nursing mothers who must use this medication should use infant formula.
Seniors: Seniors are more sensitive to the effects of this medication and usually require 1/4-1/2 the usual adult dose. Seniors are also more likely to develop side effects.
Brand Name
Helidac
Generic Ingredients
Bismuth Subsalicylate + Metronidazole + Tetracycline
The information in this profile also applies to the following drug:
Generic Ingredients: Bismuth Subcitrate Potassium + Metronidazole + Tetracycline
Pylera
Type of Drug Antibacterial combination.
Prescribed For Duodenal ulcers.
General Information
Research has shown that the bacterium Helicobacter pylori is usually present in ulcer disease and some forms of gastritis. Drugs used to treat the H. pylori infection are prescribed along with a drug that alleviates ulcer symptoms by blocking stomach acid. There are a variety of approaches to treating ulcers by using combinations of various antibiotic and acid-blocking drugs. Helidac combines 3 drugs with antibacterial or antibiotic action. This combination generally works by disrupting the cell walls of the bacterium and interfering with its ability to make proteins or duplicate
itself. It is often prescribed together with ranitidine, cimetidine, or another acid Mocker. Other treatments use other drug comb-
nations.
Cautions and Warnings
Do not take Helidac if you are allergic or sensitive to any of its
ingredients.
Do not take Helidac if you have severe liver or kidney disease. People with less severe liver disease may require a reduced dosage.
Rarely, bismuth causes severe nervous system toxicity. Symptoms go away after the drug is stopped.
Bismuth subsalicylate can cause dark stools or darkening of the tongue. This darkening of stools is not dangerous; however, be aware that blood in the stool often manifests as blackening of the stool.
Children or teenagers who have or are recovering from chickenpox should not use Helidac because it contains a small amount of salicylate, which is related to aspirin. Children or teenagers who take aspirin or a salicylate may develop Reye’s syndrome: symptoms include nausea and vomiting.
Bismuth can also cause ringing in the ears, especially if taken along with another aspirin-containing drug.
Metronidazole can cause convulsive seizures and nervous system effects including numbness or tingling in the arms, legs, hands, or feet. The risk of developing these effects increases with dosage and duration of use. Call your doctor at once if you experience any of these effects.
Metronidazole should be taken with caution by people who have had blood diseases or nervous system disorders, such as seizure disorders.
Candida infections may worsen while you are taking metronidazole.
Other infections, called superinfections, can develop while you are taking tetracycline. If this happens, your doctor will discontinue Helidac and prescribe a different drug to treat your H. pylori infection, ;a% %0M as another drug to treat the superinfection.
Tetracycline should not be used in children under age 8 due to the risk of tooth discoloration.
People taking tetracycline can develop pseudotumor cerebri (pressure inside the brain), the symptoms of which are usually headache and blurred vision. Symptoms usually go away when the drug is stopped, but permanent damage can result.
Tetracycline may increase your sensitivity to the sun; use sun-
screen and wear protective clothing.
Tetracycline may make contraceptive drugs less effective. Another or additional forms of contraceptive should be used.
Possible Side Effects
? Most common: nausea and diarrhea.
? Less common: abdominal pain, blood in the stool, head-
ache, anal discomfort, appetite loss, dizziness, tingling in
the hands or feet, vomiting, muscle weakness, constipa-
tion, sleeplessness, pain, and respiratory infections.
For more information on possible side effects, see Metronidazole, page 718, and Tetracycline Antibiotics, page 1103.
Drug Interactions
• Tetracycline antibiotics, which are bacteriostatic, may interfere with the action of bactericidal (bacteria-killing) agents such as penicillin. You should not take both kinds of antibiotics for the same infection.
• Antacids, mineral supplements, and multivitamins containing bismuth, calcium, zinc, magnesium, and iron can reduce the effectiveness of tetracycline. Separate doses of your antacid, mineral supplement, vitamin with minerals, or sodium bicarbonate and Helidac by at least 2 hours.
• Tetracycline and metronidazole may each increase the effect of anticoagulant (blood-thinning) drugs such as warfarin. An adjustment in the anticoagulant dosage may be required.
• Cimetidine can increase metronidazole blood levels. Your metronidazole dosage may be reduced if you are also taking cimetidine.
• Tetracycline should not be used with methoxyflurane due to the risk of a toxic interaction.
• Tetracycline may increase blood levels of digoxin in a small number of people, leading to possible digoxin side etezks. (” %kjMt pelop% 1his’interaction with digoxin can occur for months after tetracycline has been stopped. If you are taking this combination, watch carefully for digoxin side effects and call your doctor if any develop.
• Tetracycline may reduce diabetic insulin requirements. If you are using this combination, be sure to carefully monitor your blood-sugar level.
• Tetracycline may increase or decrease lithium blood levels. Metronidazole raises lithium blood levels, effects, and toxicity.
• Combining alcohol and metronidazole may cause abdominal cramps, nausea, vomiting, headaches, and flushing. Modification of the taste of alcohol has also been reported. Metronidazole should not be used if you are taking disulfiram (a drug used to maintain alcohol abstinence) because the combination can cause confusion and psychotic reactions.
• Phenobarbital and other barbiturates can decrease metronidazole’s effectiveness.
• Drugs that cause nervous system toxicity, such as mexiletine, ethambutol, isoniazid, lincomycin, lithium, pemoline, and long-term high-dose pyridoxine (vitamin 136) should not be taken with metronidazole because of the increased risk of nervous system side effects.
• Metronidazole may increase phenytoin blood levels and the risk of phenytoin side effects; your doctor may need to adjust your phenytoin dosage.
Food Interactions
Do not take this drug with milk or dairy products. Helidac should be taken with meals and at bedtime.
Usual Dose
Helidac
Adult: Each dose consists of 4 pills. Take all 4 pills, 4 times a day for 14 days with a full glass of water. Take your acid blocker according to your doctor’s directions.
Child: not recommended.
Pyles
Adult: 3 pills 4 times a day for 10 days with a full glass of water. Take your acid blocker according to your doctor’s directions. Child: not recommended.
Overdosage
All 3 in(aMd1K1t ,in Helidac can be dangerous if taken in overdose, but salicylate poisoning is the most threatening. Symptoms of salicylate toxicity are rapid or heavy breathing, nausea, vomiting, ringing or buzzing in the ears, high fever, lethargy, rapid heartbeat, and confusion. Other more serious symptoms may develop. Take the victim to a hospital emergency room at once. ALWAYS bring the prescription bottle or container.
Special Information
Tetracycline can reduce the effectiveness of contraceptive drugs; you should use backup contraception while taking Helidac. Breakthrough bleeding is also possible.
Bismuth can cause a temporary darkening of your tongue or stool. This is a harmless effect. Stool darkening should not be confused with blood in the stool, which turns it black.
Avoid alcohol while taking Helidac and for 1 day after you stop taking it.
Call your doctor if you develop ringing in the ears. This can be a sign of salicylate toxicity from the bismuth.
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. Never take a double dose.
Special Populations
Pregnancy/Breast-feeding: Helidac should not be taken by pregnant women. Tetracycline affects bone and tooth development in the fetus.
Tetracycline and metronidazole pass into breast milk. Tetracycline interferes with the development of the child’s skull, bones, and teeth, and metronidazole also may cause side effects in the baby. Nursing mothers who must take Helidac should use infant formula.
Seniors: Seniors may take this drug without special restriction.