Posts Tagged ‘potassium’

Generic Name
Clonidine (KLAH-nih-dene)
Brand Names
Catapres-TTS-2
Catapres-TTS-1    Catapres-TTS-3
Type of Drug
Alpha receptor stimulant.
Prescribed For
High blood pressure, including hypertensive emergency (diastolic blood pressure over 120); also used for excess sweating, childhood growth delay, attention-deficit hyperactivity disorder (ADHD), Tourette’s syndrome, restless leg syndrome, schizophrenic psychosis, migraine, ulcerative colitis, painful or difficult menstruation, hot flashes related to menopause, diagnosis of pheochromocytoma (adrenal-gland tumor), kidney poisoning associated with cyclosporine, diabetic diarrhea, smoking cessation, methadone and opiate detoxification, withdrawal from alcohol and benzodiazepines such as Valium, nerve pain following herpes attack, and allergic reactions in the presence of asthma triggered by external sources.
General Information
Clonidine stimulates nerve endings in the brain called alphaadrenergic receptors. It reduces blood pressure by dilating (widening) blood vessels. Clonidine works quickly, decreasing blood pressure within 1 hour. The other uses of clonidine relate to its stimulation of alpha receptors in the body.
Cautions and Warnings
Do not take clonidine if you are allergic or sensitive to any of its ingredients.
People who have had a stroke or recent heart attack or who have cardiac insufficiency or chronic kidney failure should avoid taking clonidine.
Some people develop a tolerance of their clonidine dosage. If this happens, your blood pressure may increase and your doctor may prescribe a higher dose.
Never stop taking clonidine without your doctor’s knowledge. If you abruptly stop taking clonidine, you may experience an unusual increase in blood pressure accompanied by agitation, headache, nervousness, and severe reactions, possibly death. Restarting clonidine therapy or taking another antihypertensive can reverse these effects.
Clonidine may cause degeneration of the    See your eye doctor for regular GheCk Ups lfiyou are taking this drug.
); you require surgery, your doctor will continue your clonidine therapy until about 4 hours before surgery and resume it as soon as possible afterward.
People who develop skin sensitivity (symptoms include rash, itching, and swelling) to Catapres-TTS, the transdermal patch form of clonidine, may experience the same reactions with oral clonidine.
Possible Side Effects
Tablets
♦    Most common: dry mouth, drowsiness, dizziness, constipation, and sedation.
♦    Common: headache and fatigue. These effects tend to diminish within 4-6 weeks.
•    Less common: appetite loss, swelling or pain in the glands of the throat, nausea, vomiting, weight gain, blood-sugar elevation, breast pain or enlargement, worsening of congestive heart failure, heart palpitations, rapid heartbeat, painful blood-vessel spasm, abnormal heart rhythms, electrocardiogram changes, feeling unwell, changes in dream patterns, nightmares, difficulty sleeping, hallucinations, delirium, anxiety, depression, nervousness, restlessness, rash, hives, thinning or loss of scalp hair, difficult or painful urination, nighttime urination, retaining urine, decrease or loss of sex drive, weakness, muscle or joint pain, leg cramps, increased alcohol sensitivity, dryness and burning of the eyes, dry nose, loss of color, and fever.
Transdermal Patch
✓    Most common: dry mouth and drowsiness.
✓    Less common: constipation, nausea, changes in sense of taste, dry throat, fatigue, headache, lethargy, changes in sleep patterns, nervousness, dizziness, impotence, sexual difficulties, and mild skin reactions including itching, swelling, contact dermatitis, discoloration, burning, peeling, throbbing, white patches, and generalized rash. Rashes of the face and tongue have also occurred but cannot be specifically tied to transdermal clonidine.
Drug Interactions
•    Combining clonidine and a beta-adrenergic blocker may increase the severity of a drug-withdrawal reaction and rebound high MW pressure. This reaction may be very serious.
•    Combining verapamil and clonidine may lead to very low blood pressure and atrioventricular (AV) block (abnormality in heartbeat patterns). This reaction may be very serious.
O    Avoid alcohol, barbiturates, and sedatives because they increase the depressive effects of clonidine.
•    Tricyclic and other antidepressants, appetite suppressants, estrogens, stimulants, indomethacin and other nonsteroidal anti-inflammatory drugs (NSAIDs), and prazosin may counteract the effects of clonidine.
•    clonidine may reduce the therapeutic effects of levadopa +
carbidopa.
Food Interactions
The tablets are best taken on an empty stomach but may be taken with food if they upset your stomach.
Usual Dose
Tablets
Adult: high blood pressure-100 mcg twice a day to start; may be raised by 100 mcg a day until maximum control is achieved. Take no more than 2400 mcg a day. Other uses-100-goo mcg a day, or up to 0.8 mcg per lb. of body weight in divided doses. Seniors should start with a lower dose and increase more slowly.
Child: 50-400 mcg orally twice a day.
Transdermal Patch
Adult: 100 mcg delivered daily from a patch applied once every 7 days. Up to two 300-mcg patches may be needed to control blood pressure. Transdermal dosage exceeding 600 mcg a day has not been shown to increase effectiveness.
Child: not recommended.
Overdosage
Symptoms of overdose are slow heartbeat, central- nervous-system depression, very slow breathing, low body temperature, pinpoint pupils, seizures, lethargy, agitation, irritability, nausea, vomiting, abnormal heart rhythms, mild increases in blood pressure followed by a rapid drop in blood pressure, dizziness, weakness, loss of reflexes, and vomiting. Victims should be taken to a hospital emergency room immediately. ALWAYS bring the prescription bottle or container.
Special Information
Gk’3t1161)e causes drowsiness in about 1/3 of people who take it. Be extremely careful while driving or performing any task that requires concentration. This effect is prominent during the first few weeks of clonidine therapy and then tends to decrease.
Do not take over-the-counter cough and cold medications unless directed by your doctor.
Call your doctor it you become depressed or have vivid dreams or nightmares while taking clonidine, or if you develop swelling in your feet or legs, paleness or coldness in your fingertips or toes, or any persistent or bothersome side effect.
Apply the transdermal patch to a hairless area of skin such as the upper arm or torso. Use a different skin site each time. If the patch becomes loose, apply the supplied adhesive directly over it. If the patch falls off before 7 days are up, apply a new one. Do not remove the patch while bathing.
If you forget a dose of oral clonidine, take it as soon as possible and then go back to your regular schedule. If you miss 2 or more consecutive doses, consult your doctor; missed doses may cause blood pressure increases and severe adverse effects. Do not take a double dose.
Special Populations
Pregnancy/Breast-feeding: Clonidine passes into the fetal bloodstream. Animal studies show that clonidine may damage the fetus in doses as low as 1/3 the maximum dose. When this drug is considered crucial by your doctor, its potential benefits must be carefully weighed against its risks.
Clonidine passes into breast milk. Nursing mothers who must take this drug should use infant formula.
Seniors: Seniors are more susceptible to the effects of this drug and should begin with lower doses.

Generic Name
Clopidogrel (kloe-PID-oe-grel) nQ
Brand Name  Plavix
Type lul Drug Antiplatelet.
Prescribed For
Heart attack and stroke prevention; also used for blood thinning after placement of a vascular stent.
General Information
Artery-clogging blood clots are often the cause of heart attacks and strokes. clopidogrel reduces the risk of both by helping prevent blood-clot formation. This drug thins the blood by making platelets—the cells that aggregate to form clots—less “sticky.” It starts working in as little as 2 hours after taking a single tablet. The drug’s blood-thinning effect lasts until inactivated platelets are replaced by the body. Studies suggest that clopidogrel is more effective than aspirin in preventing heart attack and stroke in people at risk. People taking clopidogrel after scent surgery usually take it for a relatively short period. Those taking it to prevent a heart attack or stroke must take it for life.
Cautions and Warnings
Do not take clopidogrel if you are allergic or sensitive to any of its ingredients or to ticlopidine, a related antiplatelet. These drugs can rarely cause a rapid drop in white-blood-cell count.
People with bleeding ulcers, brain hemorrhages, or other bleeding problems should use clopidogrel with caution.
Thrombotic thrombocytopenic purpura (TTP) is a rare but serious complication of clopidogrel, sometimes reported after less than 2 weeks of treatment. See your doctor right away if you develop a sudden fever, unusual bruising, nosebleeds, bleeding gums, or any other unusual symptoms. TTP reduces your platelet count, interfering with blood clotting, and affects white-blood-cell count.
People with liver problems should use clopidogrel with caution.
Possible Side Effects
✓    Most common: rash and other skin problems.
✓    Common: chest pain, accidents, flu-like symptoms, pain, headache, dizziness, abdominal pain, upset stomach, joint pain, back pain, black-and-blue marks, and respiratory infection.
✓    Less common: tiredness, Swollen arms or legs, high blood pressure, diarrhea, nausea, bleeding, nosebleeds, breathing difficulties, runny nose, coughing, bronchitis, high blood cholesterol, urinary infection, and depression.
✓    Rare: bleeding in the brain and stomach ulcer. Contact your doctor if you experience any side effect not listed above.
Drug Interactions
•    Clopidogrel may interfere with the body’s ability to break down fluvastatin, nonsteroidal anti-inflammatory drugs (NSAIDs), phenytoin, tamoxifen, tolbutamide, torsamide, and
warfann.
•    Combining clopidogrel and NSAIDs may increase blood loss and bleeding in the stomach and intestines.
•    Do not combine clopidogrel and other antiplatelet drugs or
the anticoagulant (blood thinner) warfarin unless you are
under your doctor’s direct supervision. This interaction may
prevent normal blood clotting and lead to severe bleeding
problems.
Food Interactions
Clopidogrel may be taken without regard to food or meals.
Usual Dose
Adult: 75 mg a day.
Overdosage
Little is known about the effects of clopidogrel overdose aside from reduced blood clotting. Overdose victims should be taken to a hospital emergency room. ALWAYS bring the prescription bottle or container.
Special Information
Minor cuts may take longer to stop bleeding during treatment with clopidogrel. If you are having surgery, make sure your doctor knows you are taking clopidogrel. You may have to stop taking the drug I week before surgery.
If you forget a dose, take it as soon as you remember. If it is almost time for your next dose, skip the forgotten dose and continue with your regular schedule.
Special Populations
Pregnancy/Breast-feeding: The safety of using clopidogrel during pregnancy is not known. Other antiplatelet drugs, tike aspirin, are not used during pregnancy due to their possible effects on Mrjlher and fetus. When this drug is considered crucial by your doctor, its benefits must be carefully weighed against its risks.
Clopidogrel may pass into breast milk. Nursing mothers who must take this drug should use infant formula.
Seniors: Seniors may take this drug without special precaution.

Generic Name
Clorazepate (klor-AZ-uh-pate) 99
Brand Names
Gen-Xene    Tranxene-SD
Tranxene    Tranxene T-Tab
Type of Drug
Benzodiazepine sedative.
Prescribed For
Anxiety, tension, fatigue, and agitation; symptoms of acute alcohol withdrawal; partial seizures; also prescribed for irritable bowel syndrome and panic attacks.
General Information
Clorazepate dipotassium is a benzodiazepine. Benzodiazepines directly affect the brain. They can relax you and make you more tranquil or sleepier, or they can slow nervous system transmissions in such a way as to act as an anticonvulsant. Many doctors prefer benzodiazepines to other drugs that can be used to similar effect because they tend to be safer, have fewer side effects, and usually work as well, if not better.
Cautions and Warnings
Do not take clorazepate if you are allergic or sensitive to any of its ingredients or to another benzodiazepine drug, including clonazepam.
Clorazepate can aggravate narrow-angle glaucoma, but you may take it if you have open-angle glaucoma and are receiving therapy for it.
Other conditions in which clorazepate should be avoided are: severe depression, severe lung disease, sleep apnea (intermittent cessation of breathing during sleep), liver disease, drunkenness, and kidney diseaap_, to inOn of these conditions, the qq)NSSvve effects of clorazepate may be enhanced or could be detrimental to your overall condition.
Clorazepate should not be taken by psychotic patients because it is not effective for them and can trigger unusual excitement, stimulation, and rage.
Clorazepate is not intended to be used for more than 3-4 months at a time. Your doctor should reassess your condition before continuing your prescription beyond that time.
Clorazepate may be addictive. It should be used with caution in people with a history of drug dependence.
Drug withdrawal may develop if you stop taking it after as few as 4 weeks of regular use but is more likely after longer use. It may start with anxiety and progress to tingling in the hands or feet, sensitivity to bright light, sleep disturbances, cramps, tremors, muscle tension or twitching, poor concentration, flu-like symptoms, fatigue, appetite loss, sweating, and changes in mental state. Your dosage should always be reduced gradually to prevent drug withdrawal symptoms.
Possible Side Effects
Weakness and confusion may occur, especially in seniors and in those who are more sickly.
✓    Most common: mild drowsiness during the first few days of therapy.
✓    Less common: confusion, depression, lethargy, disorientation, headache, inactivity, slurred speech, stupor, dizziness, tremors, constipation, dry mouth, nausea, inability to control urination, sexual difficulties, irregular menstrual cycle, changes in heart rhythm, low blood pressure, fluid retention, blurred or double vision, itching, rash, hiccups, nervousness, inability to fall asleep, and occasional liver and kidney dysfunction. If you have any of these symptoms, stop taking the medicine and contact your doctor immediately.
✓    Rare: Rare side effects can affect your heart, stomach and intestines, urinary tract, blood, muscles and joints. Contact your doctor if you experience any side effects not listed above.
Drug Interactions
•    Clorazepate is a central-nervous-system depressant. Don’t mix it with alcohol, other sedatives, narcotics, barbiturates, monoamine oxidase inhibitor and other antidepressants, and antihistamines. Taking Clorazepate with these drugs may result in excessive depression, tiredness, sleepiness, breathing difficulties, or related symptoms.
•    Smoking may reduce clorazepate’s effectiveness by in-
creasing the rate at which it is broken down by the body.
•    Clorazepate’s effects may be prolonged when it is mixed with cimetidine, contraceptive drugs, disulfiram, fluoxetine, isoniazid, ketoconazole, metoprolol, probenecid, propoxyphene, propranolol, rifampin, or valproic acid. Theophylline may reduce clorazepate’s sedative effects.
•    If you take antacids, separate them from your clorazepate dose by at least 1 hour to prevent them from interfering with the absorption of clorazepate into the bloodstream.
•    Clorazepate may increase blood levels of digoxin and the chances of digoxin toxicity.
•    The effect of levodopa + carbidopa may be decreased if it is taken together with clorazepate.
•    Combining clorazepate with phenytoin may increase phenytoin blood concentrations and the chances of phenytoin toxicity.
Food Interactions
Clorazepate is best taken on an empty stomach, but it may be taken with food if it upsets your stomach.
Usual Dose
Immediate-Release
Adult and Child (age 9 and over): 15-60 mg daily. The average dose is 30 mg in divided quantities, but dosage must be adjusted to individual response for maximum effect. Maximum recommended daily dose is 90 mg. For treatment of anxiety, clorazepate may be taken as a single dose at bedtime.
Child (under age 9): not recommended.
Sustained-Release
Adult: The sustained-release form of clorazepate may be given as a single dose, either 11.25 or 22.5 mg, once every 24 hours. Sustained-release tablets are not recommended for the initial dosage.
Child: not recommended.
Overdosage
Symptoms of overdose are confusion, sleepiness, poor coordination, lack of response to pain such as a pin prick, loss of reflexes, shallow breathing, low blood pressure, and coma. The victim should be taken to a hospital emergency room. ALWAYS bring the prescription bottle or container.
Special Information
Clorazepate can cause tiredness, drowsiness, inability to concentrate, or similar symptoms. Be careful if you are driving, operating machinery, or performing other activities that require concentration.
People taking clorazepate for more than 3 or 4 months at a time may develop drug withdrawal reactions if the medication is stopped suddenly (see “Cautions and Warnings”). Do not stop taking clorazepate or increase or decrease your dosage without first consulting your doctor.
If you forget a dose of clorazepate, 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.
Special Populations
Pregnancy/Breast-feeding: Clorazepate may cause birth defects if taken during the first 3 months of pregnancy. Avoid this drug if you are or might be pregnant.
Clorazepate may pass into breast milk. Nursing mothers who must take clorazepate should use infant formula.
Seniors: Seniors, especially those with liver or kidney disease, are more sensitive to the effects of clorazepate and generally require smaller doses to achieve the same effect.

metronidazole An orally effective drug used in trichomoniasis, amoebiasis and in infections due to anaerobic bacteria. Dose: in bacterial and trichomonal vaginitis, 600 ing daily for 7 days, or as a single dose of 2g. In acute intestinal arnoebiasis, 2.4 g daily for 3 days. In surgical prophylaxis, and in the prophylaxis and treatment of infections caused by colonic anaerobic pathogens such as Racteriodes ftagilis, as well as infections by some Gram-negative organisms. metronidazole is given in doses of 1.2 g daily orally, or as I g suppositories. In severe infections, doses of 1.5 g are given daily by i.v. infusion, replaced by oral therapy as soon as possible. In Giardia laniblia infections, 2g daily for 3 days; 600 mg daily for 3 days in ulcerative gingivitis. Metronidazole is also valuable in pseudomembranous colitis (see clindamycin). Side-effects are mainly gastrointestinal disturbances and can be reduced by giving the close with food, but epileptiforni seizures may occur with high doses, and the drug may cause a disulfiraintype reaction if alcohol is taken. (Flagyl). Metronidazole is also used as a 0.750% gel (Metrogel; Rosex) in rosacea and as Anabact ail(] Metrotop to deodorize malodorous tumours.
metyrapone Ail inhibitor of glucocorticoid synthesis.
Dose: 750 mg 4-hourly for 6 doses as a Icst of anterior pituitary function, as following such doses the plasma concentration ofcorticosteroids falls. The fall stimulates the production of steroid pre cursors by the adrenal glands, and a rise in the urinary excretion of such precursors is indicative of an active anterior pituitary gland. Metyrapone is also used in resistant oedema due to ail increased production of aldosterone, and in the symptomatic con-I rol 01′ Cushing ’s syndrome. Nausea and vomiting are side-effects. (Metopirone).
mexiletine Ail anti-arrhythmic drug that is useful in the control of ventricular arrhythmias, particularly those following myocardial infarction, or when lignocaine is ineffective.
Dose: as a loading dose, 100-250 mg i.v. under I-I’C6 control, followed by i.v. infusion of a 0.1% solution until a further 250 mg have been given. Oral therapy: a
loading dose of 400 mg, followed by 600mgI g daily. Side-effects are nausea, drowsiness, confusion and blurred vision. Contraindicated in bradycardia, hypotension, and hepatic or renal failure. (Mexitil).
mianserin An antidepressant of the amitriptyline type, with reduced anticholinergic and cardiovascular side-effects, and well tolerated by the elderly. It is of value in all types of depression, including those associated with anxiety. Dose: 30-90 mg daily, which may be taken as a single close at night, although higher doses have been given. Care is necessary in recent myocardial infarction and heart block. Severe hepatic disease is a contraindication. Side-effects include aplastic anaemia,and blood counts during treatment are essential. The drug should be withdrawn if any signs of infection occur. See page 128 and Table 11.
miconazole An antiftingal agent of value in systemic and alimentary fungal infections. Dose: I g daily orally, or up to 1.8 g daily by i.v. infusion, and the duration of treatment largely depends on the response.
Pessaries of 100 mg and a cream (2%) are used for vaginal candidiasis. A gel is available for oral fungal infections. Side-effects after systemic use include nausea, pruritus and rash. Miconazole may potentiate the action of anticoagulant, anticonvulsant
and hypoglycaemic drugs, requiring an adjustment of close. Combined use with asternizole, terfenadine and cisapride should be avoided. (Daktarin).
midazolam A sedative of the benzodiazepine group, used mainly for sedation before and during gastroscopy, endoscopy and other investigations. The action is rapid, and an anterograde amnesia often follows.
Dose: by slow i.v. injection 70pglkg tip it) a total d2.5-7 mg. premedication, 2.5-5 mg i.m. For the induction of anaesthesia in poor-risk patients, 104-300pg1kg by slow i.v. injection. Side-effects after i.v. injection include respiratory depression and, occasionally, severe hypotension. (Hypnovel).
mifepristone An antiprogestational agent used as ail alternative to surgery for the termination of pregnancy, up to 63 days’ gestation.
Dose: a single oral dose of 600 mg. For hospital use only. (Nfifegyne).

milrinone An inhibitor of phosphodiesterase, an enzyme concerned in cardiac function. It has a digoxin-like effect on the myocardium, and may be effective in congestive heart failure not responding to other drugs.
Dose: by i.v. infusion as an initial dose of 50 pg1kg, with maintenance doses of 0.5 pg/min up to a total of 1.13 nig/kg over 24 hours. Side-effects are anginal pain, hypotension and headache. (Primacor). See enoximone, page 141 and Table 18.
minocycline A tetracycline with the general properties of that group of antibiotics, with the advantage of being useful in meningococcal prophylaxis. The absorption of minocycline is little influenced by food. It is also suitable for use when the renal function is impaired, as accumulation of the drug is unlikely.
Dose: 200 mg daily. In acne treatment half-dose should be given for 0 weeks. The side-effects are those of the tetracyclines generally, although monocychne may also cause dizziness, vertigo and rash. (Minocin).
minoxidil A vasodilator used in severe hypotension resistant to other drugs. Dose: 5-50 mg daily. Side-effects are Wright gain, breast tenderness and tachycardia. Almost all patients experience hyper1richosis, and should be warned accordingly. (Loniten). A 2% solution is used as a lotion in the local treatment of male-pattern baldness. (Regaine).
mirtazapine An alpha,-receptor antagonist. It is used in depression as it increases central noradrenergic and serotenergic neurotransmission. rot ransmission.
Dose: 15-45 nag at night for 4-6 months. Side-effects are weight gain and drowsiness. (Zispin).
misoprostol A synthetic prostaglandin with an inhibitory action on gastric secretion. It is used in the control of peptic ulcer, and in the prophylaxis of ulcers induced by non-steroidal anti-inflaniniatory drugs (NSAIDs).
Dose: 800pg daily with food, with a last dose at night, and continued for some weeks. Dose in prophylaxis, 400-800µg daily. Side-effects are usually transient, and
.    include diarrhoea, nausea and abdominal pain. (Cytotec). See page 162. Contraindicated in pregnancy.
mitobronitol A cytotoxic agent used mainly in chronic myeloid leukaemia.
Dose: 250 nag daily until the white cell count falls, then 125 mg daily according to need. May cause gastrointestinal disturbance, alopecia and bone marrow depression. Haematological control is necessary. (Myclobromal). See page 122 and Table 8.
mitomycin A cytotoxic antibiotic used in bi cast, gastrointestinal and other cancers. Dose: 4-10 mg by i.v. infusion at intervals of I-6 weeks. Great care must tic taken to avoid extravasation. Also used in bladder cancer by the weekly instillation of a solution of 10-40 nag in 20-40 nil of water. Side-effects include bone marrow and renal damage, and lung fibrosis.
mitozanitrone A cytotoxic drug related to doxorubicin, and indicated in advanced breast cancer.
Dose: 14 nighn= once i.v., repeated after 21 days, provided the white cell and platelets counts have returned to normal. It is highly irritant, and contact of the drug wid the skin must be avoided. Side-effects are nausea, vomiting, alopecia, myelosuppression and cardiac weakness. (Novantrone). See page 122 and Table 8.
mivacurium A non-depolarizing muscle relaxant with the short action and uses of atracurium.
Dose: initial dose 70-250pg/kg i.v., followed by doses of 100µg/kg/min at intervals of 15 minutes as required. Smaller doses are given by i.v. infusion. (Mivacron).
moclobemideVA short-acting, reversible inhibitor of monoamine oxidase (MAO) for the treatment of severe depression. The older MAO-inhibitors act on both the A- and B-forms of the enzyme, and have a long and irreversible action. Moclobemide has a rapid and selective action on MAO-B, but the duration is short and fades after about 24 hours, as the drug is soots    The risks of reactions with other drugs (comnlon with old MAO-inhibitors) are correspondingly reduced.
Dose: 300 mg daily initially (after withdrawal of other therapy), slowly increased up to 600 ing daily. Side-effects are dizziness and sleep disturbances. (N-lanerix). See page 128 and Table 11.

moexepril An ACE-inhibitor.
Dose: (when given alone) 7.5 mg daily initially, increasing if required up to 30 mg daily. When given as a second-line therapy with a diuretic (which should be avoided), initial dose is 3.75 mg under supervision until the blood pressure has stabilized. Side-effects are hypotension and cough. I lyperkalaernia may occur if potassium supplements or potassium sparing diuretics are also given. (Perdix). See page 148 and Table 21.
molgramostimVA recombinant form of human granulocyte macrophage colony stimulating factor (GM–CSF). It is used in the neutropenia following cytotoxic and bone marrow transplant therapy.
Dose: 60 000-100000 units by s.c. injc, tion or i.v. infusion, under haematological control. (Leucomax). See filgrastini and lenograstini.
mometasoneVA potent corticosteroid used as 0.1% creamilotion once a day in severe eczema, psoriasis and other skin conditions not responding to other therapy. (Elocon). Also used as a nasal spray in allergic rhinitis. (Nasonex).
monoamine oxidase inhibitors Monoaniine oxidase is an enzyme concerned with the breakdown of dopamine, serotonin, noradrenaline and adrenaline. Those substances are stored in many organs of the body, including the brain, where they function as transmitters of nerve impulses. The period for which they act is very short, as they are rapidly metabolized by monoamine oxidase. An inhibition of the enzyme could permit an increase in the brain levels of such amines, and on that basis sonic monoamine oxidase inhibitors (MAOIs) have been used in the
treatment of depression. Therapy is complicated by the fact that these drugs can increase the response to pressor drugs, anaesthetics and many other agents, including the mild sympathominictics present in some cough
mixtures and decongestive nasal sprays. Even certain foods, particularly cheese, may cause a dangerous rise in blood pressure during MAO] therapy and patients should always carry the MAN warning card. Great care is necessary during combined therapy, and ideally 10-14 days should elapse after ceasing
MAGI treatment before using other potent drugs. Examples of MAOIs are isocarboxazid, phenelzine and tranylcypromine. Their use has declined as more effective antidepressants of the amitriptyline type, with fewer side-effects, have become available. See moclobemide, page 128 and Table 11.
moraeAzine A potent cardiac membrane-stabilizing agent used like lignocaine to control ventricular arrhythmias.
Dose: 600-900 mg daily initially, adjusted later according to need and response. Side-effects include dizziness, palpitations and chest pain. (Ethniozinc),
tmorphine The principal alkaloid of    71 Opium. It is widely used as a narcotic analgesic for the relief of severe pain and the associated anxiety and stress, and in shock.
Dose: in acute pain, 10 mg by injection as required; in chronic pain it may be given orally or by injection according to need in doses varying from 5-10 mg. Sonic long-acting oral forms of
morphine are available (MST Continus; Oramorph SR) designed to reduce the frequency of dosing in conditions of severe pain. Side-effects include nausea and vomiting, which can often be controlled by small doses of chlorpromazine, or a similar antiemetic.
Morphine may cause respiratory depression, and severe respiratory depression is a contraindication. The possibility of tolerance to and dependence on morphine should be kept in mind if treatment is prolonged, but in terminal Conditions is of little importance.
moxisylyte (thymoxamine) An alpha,- adrenergic blocking agent, given by intracavernous injection for the induction of erection.
Dose: 10 mg not more than 3 times a week. Side-effects are drowsiness. dizziness and flushing. (Erecnos).
moxonidine A centrally acting antihypertcjisive agent of the clonidine type. It has a greater affinity for certain receptors in the brain stem that reduce the peripheral resistance and so indirectly lowers the blood pressure.

lithium succinate Lithium succinate appears to have sonic antifungal and anti-inflammatory properties, and is used as an 8% ointment for seborrhoeic dermatitis. (Ftalith).
lodoxamide A mast cell stabilizer similar to sodium cromoglycate. Used as eye drops (0.1%) in allergic conjunctivitis. (Alomide).
Dose: in acute diarrhoea, 4 mg initially, followed by 2 nig as required, up to a maximum of 16 ing daily. In chronic diarrhoea, 4-8 nig daily, but care is necessary in the elderly to avoid faecal impaction. Loperamide is not suitable for children under 4 years of age, nor in patients with liver disease, as it may cause undesirable sedation. (Iniodium).
loprazolam A benzodiazepine hypnotic used mainly in the short-term treatment of insomnia and nocturnal arousal. Dose: 1-2 nig at bedtime. Side-effects include drowsiness, dizziness, dry mouth and headache. See page 152 and Table 22.
loratadine An antihistamine with the general action of that group of drugs, but with reduced sedative side-effects.
Dose: 10 nig dailv. (Clarityn). See page I 10 and Table 2.
63
lofepramine An antidepressant of the irnipramine group, with similar actions and uses, but reduced sedative and anticholinergic side-effects.
Dose: 140-210 nig daily. (Gamanil). See page 128 and Table 11.
lofexidine A narcotic antagonist. It has a selective blocking action on brain nor-adrenaline, and is used for the rapid relief of opioid withdrawal symptoms associated with central sympathetic activity.
Dose: 200 pg twice a day, slowly increased as required over 7-10 days, before withdrawal over 2-4 days. Care is necessary in cardiac insufficiency and bradycardia. (Britl.olex).
lomotil A preparation of diphenoxylate with atropine, for the rapid control of diarrhoea. Dose: 2 tablets 6-hourly.
lomustine A slow-acting cytotoxic agent used in Hodgkin’s disease and solid tumours.
Dose: 130 ing/ni’body surface at intervals of (> 8 weeks. Side-effects, include anorexia. nausea, liver damage and niyelodeprm ion. Dosage should not be repeated until white cell and platelet counts have returned to an acceptable level. Reduced doses are given
when lomustine forms part of a multi-drug dosage scheme. (CCNU). See page 122 and Table 8.
loperamide A synthetic inhibitor of peristalsis.
lorazepam A short-acting anxiolytic/ hypnotic similar to diazepam, but less likely to cause next-day drowsiness. Dose: 1-4 mgdaily. It is also given in similar oral closes or by slow i.v. injection in doses of 50 pglkg for preoperative sedation and anuiesia. Occasionally used i.v. in status epilepticus in doses of 4 nig, but apnoea and hypotension are side-effects that may require resuscitation. fAtivan). See page 152 and Table 22.
lormetazepam A short-acting benzodiazepine hypnotic. It is useful in the treatment of insomnia in the elderly, but is less suitable for insomnia associated with early awakening.
Dose: 500 fig I nig at night. See page 152 and ‘]’able 22.
losartanV An angiotensin 11 receptor antagonist used in the treatment of hypertension.
Dose: 50ing daily The use of potassium-sparing diuretics should be avoided with losartan. It has the advantage of not causing the persistent dry cough associated with ACE inhibitors. (Cozaar). See page 148 and Table 21.
low molecular weight heparins See heparin.
loxapine Antipsychotic agent with the actions and uses of chlorpromazine. Dose: in acute and chronic psychoses, 25-50 mg daily, slowly increased as required. Maintenance doses range from 20-100111g daily. Side-effects are those of other anti-psychotic agents. but loxapine may cause nausea, vomiting and weight changes. f .oxapac). See page 168 and Table 30.
I Mob
magnesium hydroxide A mild antacid laxative, usually given in aqueous suspension as Cream of Magnesia, although tablet forms are also available. Cream of Magnesia is a useful antidote in mineral acid poisoning.
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Lugol’s solution An aqueous solution of iodine 5% and potassium iodide 10%. Used in the preoperative treatment of t hyrotoxicosis.
Dose: 0.3-1 ml.
lymecycline A soluble complex of tetracycline and lysine. It has the action and uses and side-effects of tetracycline, but is absorbed more readily.
Dose: 800 mg daily. (Tetralysal).
typressin An analogue of vasopressin used to control the polyuria of pituitary diabetes insipidus.
Dose: 2.5-10 units several times a day by nasal spray. Side-effects include nausea and abdominal pain. I.ypressin has some vasoconstrictor properties, and desmopressin is sometimes prellcrred. (Syntopressin).
lysuride (lisuride) A bromocriptine-like drug for the treatment of parkinsonism. II acts by stimulating any surviving dopamine receptors in the brain.
Dose: 200 pg at night with food,
irk ceased at weekly intervals according to response up to a maximum of 5 mg daily. Side-effects include nausea, dizziness and initial hypotensive reactions which may affect driving ability. (Revanil). See
page 160 and Table 26.
magnesium sulphate Epsom salts. A powerful saline aperient, producing loose stools by preventing the reabsorption of water.
Dose: 5- 15 g before breakfast. Used externally for the treatment of boils and carbuncles as a paste with glycerin. A marked loss of plasma magnesium may occur after severe diarrhoea or drug-induced diuresis, and may require the i.v. infection of magnesium sulphate in doses based on the degree of hypoinagnesacmia. It has also been given i.v. in a dose of 8 mmol in the emergency treatment of severe;U’rhythinias associated with hypokalaemia.
magnesium trisilicate A white insoluble powder, with mild but prolonged antacid effects. It was formerly widely used in the symptomatic treatment of peptic ulcer;
now used chiefly for dyspepsia.
Dose: 0.3-2 g.
malathion An organophosphorus insecticide. Used as a lotion 0.5% for lice and scabies as alternative to lindane or carbaryl.
mannitol A sugar that is not metabolized, and is used mainly as an osmotic diuretic. Dose: (after a test dose of 200 mg/kg) 50-200 g by slow i.v. infusion over 24 hours. Mannitol has also been used by i.v. infusion as a short-term ocular hypotensive agent in the treatment of glaucoma. It is also useful in cerebral oedema, given by rapid i.v. injection in a dose of I g/kg as a 2044, solution.
macrolides A group of antibiotics that differ chemically from the penicillins, yet have a similar pattern of activity. They are active orally and are useful in the treatment of penicillin-sensitive patients. Erythromycin is the most widely used member of the group, with clarithromycin and azithromycin as more recent introductions.
magnesium carbonate A white, insoluble powder with antacid and laxative properties.
Dose: 0J-4 g daily.
maprotiline A sedative antidepressant with a general action similar to that of the tricyclic drugs represented by amitriptyline. Dose: 25-150 mg daily. If given at night as a single dose, the sedative action may reduce the need for other drugs. It has milder anticholinergic side-effects than some related compounds, although skin rash is more common. (I udionlil). See page 128 and Table 11.
mebendazole An anthelmintic effective against most intestinal worms.

Dose: 100 mg once for threadworm, and 100 mg twice daily for 2 days against other infestations. Generally well tolerated, but it should not be given to children under 2 years of age. (Verniox).
I Men
in oedematous states. A potassium supplement may be required. Care is necessary in renal and hepatic deficiency.
(KiYcaron). See page 148 and Table 21.
mebeverine An antispasmodic agent which, unlike the anticholinergic drugs, appears to have a direct action on the intestinal smooth muscle. It is useful in the treatment of gastrointestinal spasm and in the irritable bowel syndrome. Dose: .100 mg daily, before food. As with other antispasmodics, mebeverine should not be used in paralytic ileus. (Colofac).
medroxyprogesterone A synthetic progestogen.
Dose: in endometriosis 30 mg daily for 90 days; in dysfunctional uterine bleeding and secondary amenorrhoea: 2.3-10 mg daily for 5-10 days, starling on l6th-2 Ist day of cycle and repeated for 2-3 cycles. Large doses of 400 mg-1.5 g daily are given in breast, endometrial, prostate and other hormone-dependent cancers, or 250mg– I g weekly by deep i.m. inJection. (Farlutal; proves). Depot-proves is a long-acting product used by i.m. injection is a contraceptive. but only after fit][ counselling.
megestrol An orally active progestogen. It is used in oestrogen-dependent breast cancer, and acts by suppressing the uptake of oestrogens by the cancer cells.
Dose: 160 mg daily. Nausea and fluid retention with weight gain are occasional side-effects. (Megace). See page 122.
meloxicarn A recently introduced non-steroidal anti-inflammatory drug (NSAID) indicated in the short-term treatment of acute osteo-arthritis and the longer-term treatment of rheumatoid conditions. Dose: 7.5-15 mg once daily with food; half doses for the elderly. Suppositories of 15 mg are also available. The side-effects are basically those of the NSAI Ds in general. Meloxicam has a more selective action on cyclo-oxygenase, the enzyme involved in the biosynthesis of prostaglandins, and is less likely to cause gastrointestinal disturbance, but it has no cytoprotective action, and is not suitable for patients with peptic ulcer. (Niobic). See page 165 and Table 29.
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mefenamic acid A non-steroidal anti-inflammatory analgesic agent used to relieve moderate pain in arthritic and rheumatoid conditions, and other states requiring mild analgesic therapy such as dysmenorrhoea. Dose: 1.5 g daily after food. Side-effects are drowsiness an(] haemolytic anaemia. Diarrhoea is an indication that the drug should be withdrawn. (Ponstan). See page 165 and Table 29.
rnefloquine A drug for the prophylaxis and treatment ofchloroquine-resistant malaria. Dose: lot- short -term prophylaxis 250 mg weekly, starting 1 week before exposure and for 4 weeks after return. Doses for treatment require specialist advice. Side-effects include gastrointestinal disturbances, dizziness and weakness. It is contraindicated in patients with a history of neu ro- psych iatric disturbance, and is not suitable for use in severe renal or hepatic impairment. (Lirium). See halofantrine.
mefruside A diuretic useful in the treatment of hypertension and oedema. Dose: 25-50 mg daily in the morning, according to need and response; 25-100 mg
melphalan An alkylating agent of the mustine type. Used mainly in myelomas, lymphomas and some solid tumours. Dose: 150-300 gg/kg daily for 4-6 days, repeated after 1-2 months. In myeloma it is also given by regional perfusion. The injection solution is highly irritant and contact should be avoided. Side-effects include myelo-depression, nausea, rash and pruritus. (Alkeran). See page 122 and ‘rabic 8.
menadiol A water-soluble form of vitamin K. Dose: 10 ing daily. (Synkavit) Phytorneii,dionc i.% now preferred.
menotrophin Human menopausal gonadotrophin containing follicle-stimulating hormone and luteinizing hormone. It is used in the treatment of anovulatory sterility. The dose depends on individual hormone assays and response. The use of the drug has resulted in multiple births. It is also given to males to stimulate spermatogenesis. (Humegon; Normegon).
menthol Colourless crystals obtained from oil of peppermint. Used as spray or drops for nasopharyngeal inflammation.