Aug
1
Chlordiazepoxide
August 1, 2009 | Leave a Comment
Generic Name
Chlordiazepoxide (klor-dye-az-uh-PDX-ide) 91
Brand Name
Librium
Type of Drug Benzodiazepine sedative.
Prescribed For
Anxiety, tension, fatigue, agitation, and withdrawal symptoms of alcoholism; also prescribed for irritable bowel syndrome and panic attacks.
General Information
Chlordiazepoxide is a member of the group of drugs known as benzodiazepines.
Benzodiazepines work by a direct effect on 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 are usually as effective, if not more so.
Cautions and Warnings
Do not take chlordiazepoxide if you are allergic or sensitive to any of its ingredients or to another benzodiazepine, including clonazepam.
Chlordiazepoxide can aggravate narrow-angle glaucoma, but you may take it if you have open-angle glaucoma and are receiving therapy for it.
Other condkjo(\SiVN\,NhjCb chlordiazepoxide should be used with caution are severe depression, especially with suicidal tendencies, severe lung disease, sleep apnea (intermittent cessation of breathing during sleep), liver disease, drunkenness, and kidney disease.
Chlordiazepoxide should not be taken by psychotic patients because it is not effective for them and can trigger unusual excitement, stimulation, and rage. It has also produced similar reactions among hyperactive and aggressive pediatric patients.
Chlordiazepoxide is not intended for more than 3-4 months of continuous use. Your condition should be reassessed before continuing chlordiazepoxide beyond that time.
Chlordiazepoxide may be addictive. Drug withdrawal may develop if you stop taking it after only 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.
Dosage of chlordiazepoxide should be decreased gradually over 4-8 weeks after prolonged use.
Possible Side Effects
Weakness and confusion may occur, especially in seniors and in those who are sickly.
♦ Most common: mild drowsiness during the first few days of therapy.
✓ Less common: depression, lethargy, disorientation, edema, headache, inactivity, slurred speech, stupor, dizziness, tremor, 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 - dysfunction. If you experience any of these symptoms, stop taking the medicine and contact your doctor immediately.
♦ Rare: 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
• Chlordiazepoxide is a central-nervous-system depressant. Avoid alcohol, other sedatives, narcotics, barbiturates, mono-amine oxidase inhibitor and other antidepressants, and antihistamines. Taking chlordiazepoxide with these drugs may result in excessive depression, tiredness, sleepiness, breathing difficulties, or related symptoms.
• Smoking may reduce the effectiveness of chlordiazepoxide by increasing the rate at which it is broken down by the body.
• The effects of chlordiazepoxide may be prolonged when it is
taken with cimetidine, contraceptive drugs, disulfiram, flu-
oxetine, isoniazid, ketoconazole, metoprolol, probenecid,
propoxyphene, propranolol, rifampin, or valproic acid.
• Theophylline may reduce chlordiazepoxide’s sedative effects.
• If you take antacids, separate them by at least 1 hour from your chlordiazepoxide dose to prevent them from interfering with the passage of chlordiazepoxide into the bloodstream.
• Chlordiazepoxide may increase blood levels of digoxin and the chances for digoxin toxicity.
• Levodopa + carbidopa’s effectiveness may be reduced by chlordiazepoxide.
• Phenytoin blood concentrations may be increased when taken with chlordiazepoxide, resulting in possible phenytoin toxicity.
Food Interactions
Chlordiazepoxide is best taken on an empty stomach but may be taken with food if it upsets your stomach.
Usual Dose
Adult: 5-100 mg a day. This range is due to individual response related to age, weight, disease severity, and other characteristics.
Child (age 6 and over): may be given if deemed appropriate by a doctor. Starting dose-5 mg 2-4 times a day. Maintenance dose—up to 30 mg a day for some children, but must be individualized to obtain maximum benefit.
Child (under age 6): 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 lakes to a hospital emergency room. ALWAYS bring the prescription bottle or container.
Special Information
Chlordiazepoxide 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.
If you forget a dose of chlordiazepoxide, 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: Chlordiazepoxide may cause birth defects if taken during the first 3 months of pregnancy. Avoid chlordiazepoxide while pregnant.
Chlordiazepoxide may pass into breast milk. Nursing mothers who must take chlordiazepoxide should use infant formula.
Seniors: Seniors, especially those with liver or kidney disease, are more sensitive to the effects of chlordiazepoxide and generally require smaller doses to achieve the same effect.
Jul
16
Alprazolam
July 16, 2009 | Leave a Comment
Generic Name
Alprazolam (al-PRAY-zoe-lam) CGI
Brand Names
Niravam Xanax Xanax XR Type of Drug
Benzodiazepine sedative.
Prescribed For
Generalized anxiety disorder and anxiety associated with depression; panic disorder with or without agoraphobia.
General Information
Alprazolam is a member of a group :)f drugs known as benzodiazepines. 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 are usually as effective, if not more so.
Cautions and Warnings
Do not take alprazolam if you know you are allergic or sensitive to it or to another benzodiazepine drug, including clonazepam.
Alprazolam can aggravate narrow-angle glaucoma, but you may take it if you have open-angle glaucoma and are receiving therapy for it.
Other conditions where alprazolam should be avoided are: severe lung disease, sleep apnea (intermittent cessation of breathing during sleep), liver disease, drunkenness, and kidney disease. In each of these conditions, the depressive effects of alprazolam may be enhanced or could be detrimental to your overall condition.
Alprazolam should not be taken by psychotic patients because it is not effective for them and can trigger unusual excitement, stimulation, and rage.
Alprazolam is meant to be used for no more than 3-4 months in a row. Your condition should be reassessed before continuing your medicine beyond that time.
Alprazolam may be addictive. When used to treat panic disorder, alprazolam is frequently prescribed in doses exceeding 4 mg a day. Studies show that these higher doses may cause physical and emotional dependence, making it very difficult to stop taking the drug. Drug withdrawal may develop if you stop taking it after only 4 weeks of regular use but is more likely after longer use and at higher doses. 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. Severe withdrawal symptoms may include seizures.
Your dosage should be reduced gradually (0.5 mg decrease every 3 days) to prevent drug withdrawal symptoms.
Possible Side Effects
V Most common: mild drowsiness during the first few days of therapy. Weakness and confusion may occur, especially in seniors and in those who are sickly. If these effects persist, contact your doctor.
V Less common: depression, lethargy, disorientation, headache, inactivity, slurred speech, stupor, dizziness, tremors, constipation, dry mouth, nausea, inabilityto control urination, Possible Side Effects (continued)
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 dysfunction. If you experience any of these symptoms, stop taking the medicine and contact your doctor immediately.
V Rare: withdrawal seizures. 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
• Alprazolam is a central-nervous-system depressant. Avoid alcohol, other sedatives, narcotics, barbiturates, monoamine oxidase inhibitor (MAGI) antidepressants, antihistamines, and antidepressants. Taking alprazolam with these drugs may result in excessive depression, tiredness, sleepiness, breathing difficulties, or related symptoms.
• Smoking may reduce the amount of alprazolam in your blood by 50%. Smokers may need larger doses.
• The effects of alprazolam may be prolonged when taken together with cimetidine, contraceptive drugs, disulfiram, fluoxetine, isoniazid, itraconazole, ketoconazole, metoprolol, probenecid, propoxyphene, propranolol, and valproic acid.
• The effects of some benzodiazepines may be decreased by rifampin.
• Theophyllines may reduce alprazolam’s sedative effects.
• If you take antacids, separate them from your alprazolam dose by at least 1 hour to prevent them from interfering with the absorption of alprazolam into the bloodstream.
• Alprazolam may raise digoxin blood levels and the chances of digoxin toxicity.
• The effect of levodopa + carbidopa may be decreased if it is taken together with alprazolam.
• Combining alprazolam with phenytoin may increase phenytoin blood concentrations and the chances of phenytoin toxicity.
Food Interactions
Alprazolam is best taken on an empty stomach but may be taken with food if it upsets your stomach.
Usual Dose
Anxiety Disorder
Adult: 0.25-0.5 mg 3 times a day. Dosage must be tailored to your individual needs with a maximum dose of 4 mg a day. Child (under age 18): not recommended.
Panic Disorder
Adult: 1 -10 mg a day.
Child (under age 18): not recommended.
Overdosage
Symptoms of overdose are confusion, sleepiness, poor coordination, lack of response to pain such as a pinprick, 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
Alprazolam can cause tiredness, drowsiness, inability to concentrate, or related symptoms. Be careful if you are driving, operating machinery, or performing other activities that require concentration.
Anyone taking alprazolam for more than 3 or 4 months at a time may have a drug withdrawal reaction if the medicine is stopped suddenly (see “Cautions and Warnings”). Do not stop taking alprazolam, or increase or decrease the dosage, without first consulting your doctor.
If you forget a dose of alprazolam, take it as soon as you remember. If it is almost time for your next dose, skip the dose you forgot and return to your regular schedule. Do not take a double dose. If you take Xanax XR, take your full daily dose once a day in the morning. Do not chew or crush Xanax XR tablets.
Special Populations
Pregnancy/Breast-feeding: Alprazolam may cause birth defects if taken during the first 3 months of pregnancy. You should avoid alprazolam while pregnant.
Alprazolam may pass into breast milk. Nursing mothers who must take alprazolam should use infant formula.
Seniors: Seniors, especially those with liver or kidney disease, are more sensitive to the effects of alprazolam and generally require smaller doses to achieve the same effect.
Jul
16
Allopurinol
July 16, 2009 | Leave a Comment
Generic Name
Allopurinol (al-oe-PURE-in-nol)
Brand Name Zyloprim
Type of Drug
Antigout medication.
Prescribed For
Gout or gouty arthritis; also prescribed to counter the effects of certain therapies for cancer, ulcers, abnormal heart rhythms in heart bypass patients, seizures, and other conditions that may be associated with too much uric acid in the body.
General Information
Unlike other antigout drugs, which affect the elimination of uric acid from the body, allopurinol acts on the system that manufactures uric acid in your body. A high level of uric acid can indicate that you have gout, psoriasis, cancer, or any of a number of other diseases. High levels of uric acid can also be caused by taking certain drugs.
In mouthwash form, allopurinol helps to prevent mouth, stomach, and intestinal ulcers caused by fluorouracil, an antineoplastic drug. Allopurinol may be given before heart bypass surgery to reduce abnormal rhythms and other surgical complications. It can be used to reduce the relapse rates of duodenal ulcers associated with Helicobacter pylori infection and to reduce the vomiting of blood from stomach irritation caused by nonsteroidal anti-inflammatory drugs (NSAIDs). Allopurinol has also been used to control seizures in people for whom standard treatments are not effective.
Cautions and Warnings
Do not take allopurinol if you are allergic or sensitive to any of its ingredients, or if you have ever developed a severe reaction to it. Stop taking the medication immediately and contact your doctor if you develop a rash or any other adverse effects while taking allopurinol. Do not start taking allopurinol again if you stopped it because of a severe reaction.
Allopurinol should be used by children only if they have high uric acid levels due to neoplastic disease or to rare metabolic conditions.
A few cases of liver toxicity have been associated with allopurinol; they improved when the drug was stopped. People taking allopurinol should periodically be tested for liver and kidney function. People with severely compromised kidney function should ake a reduced dose of allopurinol.
Possible Side Effects
✓ Most common: rash associated with severe, allergic, or sensitivity reaction to allopurinol. If you develop an unusual rash or other sign of drug toxicity, stop taking this medication and contact your doctor.
✓ Less common: nausea, vomiting, diarrhea, intermittent stomach pain, gas, upset stomach, headache, insomnia, tingling or numbness in the hands and feet, muscle or joint pain, and drowsiness or lack of ability to concentrate.
✓ Rare: 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
• Large doses of drugs that make your urine more acidic, like megadoses of vitamin C, may increase the risk of kidney stone formation.
• Alcohol, diazoxide, mecamylamine, or pyrazinamide can increase the amount of uric acid in your blood; an increase in your allopurinol dose may be required.
• Allopurinol may increase the action of azathioprine, mercaptopurine, or cyclophosphamide and other anticancer drugs, leading to possible toxicity, bleeding, or infection.
• Allopurinol may prolong the effects of chloropropamide, and can lead to hypoglycemic reactions in patients with kidney disease.
• Taking allopurinol with probenecid or sulfinpyrazone may cause excessive reduction of uric acid.
• Allopurinol may interact with some anticoagulant (blood-thinning) medications, reducing the rate at which the anti-coagulant is broken down in the body. Dosage reduction may be necessary.
• People who are susceptible to ampicillin, amoxicillin, bacampicillin, or hetacillin rash are more likely to develop such a reaction while also taking allopurinol.
• Combining a thiazide diuretic or an ACE inhibitor (for high blood pressure or heart failure) with allopurinol increases the risk of a drug-sensitivity reaction.
• Combining vidarabine with allopurinol may increase the risk of neurotoxic effects and anemia, nausea, pain, and itching.
• Large doses of allopurinol—more than 600 mg a day—may increase the effects of and risk of toxic reactions to theophylline by interfering with its clearance from the body.
Food Interactions
Take each dose with food or a full glass of water. Drink 10-12 glasses of water, juices, soda, or another liquid each day to avoid the formation of crystals in your urine or kidneys.
Usual Dose
Adult and Child (age 11 and over): 100-800 mg a day, depend-, ing on disease and response.
Child (age 6-10): 300 mg a day.
Child (under age 6): 150 mg a day.
The dose should be reviewed periodically by your doctor to be sure that it is producing the desired therapeutic effect.
Overdosage
The expected symptoms of overdose are exaggerated side effects. Allergic skin reactions to allopurinol can be severe and at times fatal. Allopurinol overdose victims should be taken to a hospital. ALWAYS bring the prescription bottle or container.
Special Information
Allopurinol can make you drowsy or make it difficult to concentrate: Take care while driving a car or operating hazardous equipment.
Gout attacks may actually increase during the first few months of taking allopurinol. These attacks should subside.
Call your doctor at once if you develop rash, hives, itching, chills, fever, nausea, muscle aches, unusual tiredness, fever, yellowing of the whites of the eyes or skin, painful urination, blood in the urine, irritation of the eyes, or swelling of the lips or mouth.
Avoid large doses of vitamin C, which can cause the formation of kidney stones during allopurinol treatment. Be sure to drink 1012 8-oz. glasses of water a day while taking this medication.
If you forget to take a dose of allopurinol, take it as soon as possible. If it is almost time for your next regular dose, double this dose. For example, if your regular dose is 100 mg and you miss a dose, take 200 mg at the next usual dose time.
Special Populations
Pregnancy/Breast-feeding: Allopurinol may cause birth defects or interfere with fetal development. Check with your doctor before taking it if you are or might be pregnant.
Allopurinol passes into breast milk. Nursing mothers who must take allopurinol should use infant formula.
Seniors: No special precautions are required. Follow your doctor’s directions and report any side effects at once.
Jul
16
Adefovir
July 16, 2009 | Leave a Comment
Generic Name
Adefovir (ah-deh-FOE-veer)
Brand Name Hepsera
Type of Drug Antiviral.
Prescribed For
Chronic active hepatitis B in adults.
General Information
Hepatitis B is one of several different types of hepatitis, a viral infection of the liver. Adefovir is an antiviral drug that can reduce the amount of hepatitis B virus in the bloodstream and slow its spread to healthy liver tissue, however, it cannot cure chronic hepatitis B. People with chronic hepatitis B may develop liver cirrhosis or liver cancer and it is not known if adefovir can prevent these conditions from occurring. Like other viruses and bacteria, the hepatitis B virus can become resistant to the effects of adefovir.
Adefovir works against the hepatitis C virus in a way similar to that of certain human immunodeficiency virus (HIV) drugs. It interferes with an enzyme called reverse transcriptase, which is an essential component of the viral reproduction process. Almost half of each dose is eliminated via the urine within 24 hours of taking it.
Cautions and Warnings
Do not take adefovir if you are allergic or sensitive to any of its ingredients.
Adefovir can be toxic to the kidneys, especially in people who already have some kidney problems. Since it is eliminated from the body through the kidneys, people with kidney disease are often given lower doses of adefovir.
In some cases, hepatitis can become severely aggravated upon discontinuation of adefovir. Your doctor should check your liver for’ 2 weeks after the drug is stopped. it is possible that antiviral therapy may have to be re-started.
Adefovir has some activity against the human immunodeficiency virus (HIV). An HIV blood test is recommended before starting adefovir treatment. If you are HIV positive, adefovir could make the HIV virus resistant to future antiviral drugs.
People taking adefovir can develop liver disease, liver enlargement, fat degeneration, and lactic acidosis (potentially fatal metabolic imbalance). This may be a reason for your doctor to stop your adefovir treatment. This occurs most frequently in obese women.
Possible Side Effects
In studies, side effects reported in the treated group were similar in frequency to placebo.
✓ Most common: weakness, headache, stomach pain, and nausea.
✓ Less common: intestinal gas, diarrhea, and upset stomach.
Drug Interactions
This drug was studied extensively in an attempt to predict possible drug interactions. No major interaction problems have been revealed.
• Taking drugs that can be toxic to the kidneys (such as amino-glycosides, cyclosporine, nonsteroidal anti-inflammatory drugs (NSAIDs), tacrolimus, and vancomycin) together with adefovir can lead to the more rapid appearance of kidney damage.
• Ibuprofen, when taken in dosages of 800 mg 3 times a day, will increase adefovir blood levels by about 20 %, however the importance of this finding is unknown.
Food Interactions
Adefovir may be taken without regard to food or meals.
Usual Dose
Adults: 10 mg once a day. People with kidney disease requiring dialysis may take only 10 mg a week. The exact dosage is based on the severity of kidney disease.
Child: not recommended.
Overdosage
Gastrointestinal symptoms are the most likely outcome of an adefovir overdose. Take the victim to a hospital emergency room. ALWAYS bring the prescription bottle or container.
Special Information
Practice safe sex and safe needle use. People taking adefovir may still spread hepatitis B through sexual contact or by sharing needles. Practice safe sex using condoms and dental dams.
Do not share personal items that can have blood or body fluids on them, such as toothbrushes or razor blades.
Try to take adefovir at the same time every day.
Adefovir must be taken continuously to maintain its effectiveness. Be sure to keep enough adefovir on hand so that you do not run out of medicine.
If you take adefovir on a regular schedule and 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. Do not take a double dose of this medicine. Call your doctor if you forget 2 or more doses in a row. Skipping or forgetting too many doses can make the hepatitis C virus resistant to adefovir.
Call your doctor at once if you feel very weak or tired, cold (especially in your arms and legs), dizzy or lightheaded, have unusual muscle pain, trouble breathing, stomach pain with nausea and vomiting, or have a fast or irregular heartbeat. These could be signs of lactic acidosis.
Call your doctor if you experience jaundice (symptoms include yellowing of the skin or whites of the eyes), appetite loss for a few days or more, lower stomach pain, nausea, dark urine, or bowel movements that are light in color. These could be signs of liver toxicity.
Special Populations
Pregnancy/Breast-feeding: Animal studies with adefovir have revealed a tendency for some birth defects when the dosage administered was more than 20 times the average human dose. There is no information on the effect of adefovir during pregnancy. The company that produces adefovir has established a registry to collect information on pregnant women who take this drug. When this drug is considered crucial by your doctor, its potential benefits may be carefully weighed against its risks.
It is not known if adefovir passes into breast milk. Nursing mothers who must take it should use infant formula.
Seniors: Seniors may be more sensitive to adefovir’s side effects because of the natural loss of kidney function that occurs with advancing age.
Jul
16
Acyclovir
July 16, 2009 | Leave a Comment
Generic Name
Acyclovir
Brand Name Zovirax
Type of Drug Antiviral.
Prescribed For
Initial treatment and maintenance of genital herpes outbreaks; treatment of herpes zoster (shingles); and treatment of varicella (chickenpox).
General Information
Acyclovir is the only oral drug that reduces growth rates of the herpes virus and the related viruses, Epstein-Barr, varicella, and cytomegalovirus (CMV); both oral acyclovir and oral ganciclovir work against CMV Intravenous drugs, including acyclovir injection, may also be used for these viral infections; however, intravenous antiviral drugs are usually reserved for patients with HIV, cancer, or otherwise compromised immune systems.
Acyclovir is selectively absorbed into cells that are infected with the herpes simplex virus, where it is converted into its active form. Acyclovir works by interfering with the reproduction of viral DNA, slowing the growth of existing viruses. It has little effect on recurrent infections. To treat both local and systemic (whole-body) symptoms acyclovir must be given by intravenous injection or taken by mouth. Local symptoms may be treated with the ointment alone. Oral acyclovir may be taken every day to reduce the number and severity of herpes attacks in people who suffer 10 or more attacks a year; it may also be used to treat intermittent attacks as they occur, but treatment must be started as soon as possible to have the greatest effect.
Cautions and Warnings
Do not use acyclovir if you are allergic or sensitive to any of its ingredients. Do not use acyclovir ointment if you have had an allergic reaction to it or to the major component of the ointment base, polyethylene glycol. Do not apply acyclovir ointment inside the vagina because the polyethylene glycol base may cause irritation and swelling of sensitive vaginal tissue. Acyclovir ointment is not intended for use in the eye and should not be used to treat a herpes infection of the eye.
Renal failure has occurred in patients using oral acyclovir, in some cases resulting in death. People with kidney impairment should have dosages adjusted accordingly.
Maintain adequate hydration while taking oral acyclovir. Animal testing indicates that acyclovir may affect fertility in men. These effects may be reversible.
Possible Side Effects
Capsules, Suspension, and Tablets
✓ Most common: feeling unwell, headache, diarrhea, nausea, and vomiting.
✓ Less common: appetite loss, stomach gas, constipation, fatigue, rash, leg pains, sore throat, a bad taste in the mouth, sleeplessness, and fever.
♦ Rare: aching joints, weakness, and tingling in the hands or feet. Contact your doctor if you experience any side effect not listed above.
Ointment
✓ Most common: mild burning, irritation, rash, and itching. These effects are more likely to occur when treating an initial herpes attack than a recurrent attack. Women are 4 times more likely to experience burning than men.
Drug Interactions
• Do not apply acyclovir together with any other ointment or topical medication.
• Oral probenecid may decrease elimination of acyclovir from the body, which increases blood levels of oral or injected acyclovir, increasing the risk of side effects.
• Combining acyclovir and zidovudine (an HIV drug—also known as AZT) may lead to severe drowsiness and lethargy.
Food Interactions
Acyclovir may be taken with food if it upsets your stomach.
Usual Dose
Capsules, Suspension, and Tablets
Adult: genital herpes attack-200 mg every 4 hours, 5 times a day for 10 days. Recurrent infections-400 mg 3 times a day or 200 mg 5 times a day for 5 days. Suppressive therapy for chronic herpes-800 mg a day, every day for up to a year. Herpes zoster800 mg 5 times a day for 7-10 days.
Child (age 2 and over): Acyclovir has been given to children in daily doses as high as 36 mg per lb. of body weight without any unusual side effects.
Child (under age 2): not recommended.
If you have kidney disease, your doctor should adjust your dose according to the degree of functional loss.
Ointment: Apply every 3 hours, 6 times a day for 7 days. Apply enough medication to cover all visible skin lesions. About 1/2 in. of ointment should cover about 4 sq. in. of lesions. Your doctor may prescribe a longer course of treatment to prevent the delayed formation of new lesions over the duration of an attack. Begin using ointment at the first sign of an attack.
Overdosage
Overdose of oral acyclovir may lead to kidney damage due to deposits of acyclovir crystals in the kidneys. Other side effects include agitation, seizures, lethargy, and coma. The risk of experiencing toxic side effects from swallowing acyclovir ointment is quite small. In the case of overdose or accidental ingestion, call your poison control center. ALWAYS bring the prescription bottle or container.
Special Information
Use a finger cot or rubber glove when applying acyclovir ointment to protect against inadvertently spreading the virus. Be sure to apply the medication exactly as directed and to completely cover all lesions. Keep affected areas clean and dry. Loose-fitting clothing will reduce possible irritation of a healing lesion. If you skip several doses, or a day or more of treatment, the drug will not exert its maximum effect.
Acyclovir is not a cure for genital herpes. Herpes may be transmitted even if you do not have symptoms of active disease. To avoid giving the condition to a sexual partner, do not have intercourse while visible herpes lesions are present. A condom offers some protection against transmission of the herpes virus, but spermicidal products and diaphragms do not. Acyclovir alone will not prevent herpes transmission.
Initiate therapy at the first sign of symptoms.
Women with genital herpes have an increased risk of cervical cancer. Speak with your doctor about the need for an annual Pap smear.
Call your doctor if acyclovir does not relieve your symptoms, if side effects become severe or intolerable, or if you become pregnant or want to begin breast-feeding. Check with your dentist if you notice swelling or tenderness of the gums.
Avoid exposure to excessive sunlight or sunlamps because of unusual sensitivity caused by oral acyclovir.
Special Populations
Pregnancy/Breast-feeding: Acyclovir crosses into the circulation of the fetus. Animal studies have shown that large doses—up to 125 times the human dose—cause damage to both mother and fetus. While there is no information to indicate that acyclovir affects a human fetus, do not use it during pregnancy unless it is specifically prescribed by your doctor and the possible benefit outweighs the risk.
Acyclovir passes into breast milk in concentrations up to 4 times the concentration in blood, and it has been found in the urine of a nursing infant. Although no side effects have been found in nursing babies, mothers who must take acyclovir should use infant formula.
Seniors: Shingles attacks in people over age 50 tend to be more severe and respond best to acyclovir treatment if the drug is started within 48-72 hours of the appearance of the first rash. Seniors with reduced kidney function should be given a lower dose of oral acyclovir than younger adults.
Jul
5
Topical NSAIDs
Americans have been deprived of an arthritis treatment that is widely available all over the world. Topical NSAIDs (gels, creams, and sprays) are very popular with patients and physicians in Europe, Australia, Canada, New Zealand, and dozens of other countries, but they are virtually ignored in the United States. The very same drugs (diclofenac, ibuprofen, ketoprofen, ketorolac, piroxicam, etc.) that cause so much mischief when taken orally can be applied to the skin with little, if any, risk of stomach ulcers, kidney problems, heart attacks, strokes, or other systemic complications. Except for aspirin-like compounds (salicylates) found in OTC products like Aspercreme, BenGay, Myoflex creme, and Sportscreme, you will not find topical NSAIDs on pharmacy shelves in the United States. That’s because the FDA has never approved these formulations for topical use.
How effective are topical NSAIDs for relieving the pain and inflammation of arthritis? Over the years there have been dozens of clinical trials of such products for both temporary (acute) discomfort and longer-term (chronic) treatment. 3 One review of 26 double-blind, placebo-controlled trials involving 2,853 patients concluded that “topical NSAIDs were effective and safe in treating acute painful conditions for 1 week.
Okay, okay! We hear you: “One week, big deal.” Another review examined 14 double-blind, placebo-controlled trials including almost 1,500 patients. The conclusion: “Topical NSAIDs were effective and safe in treating chronic musculoskeletal conditions for 2 weeks.” That’s a little better, but still not a long-term solution. One sour note comes from the thorough and objective Cochrane Library. The reviewers for this organization analyze all available evidence, published and unpublished, and provide their assessment of various treatments. This 2004 review looked at studies of use of topical NSAIDs for longer than 2 weeks and determined that “after 2 weeks there was no evidence of efficacy superior to placebo. No trial data support the long-term use of topical NSAIDs in osteoarthritis.
Based on this summary we would be inclined to suggest that topical NSAIDs be used for 2 weeks or less to relieve an acute arthritis flare-up. On the brighter side, there are now four newer clinical trials of use for 3 to 12 weeks. 97,98 Investigators specifically looked at osteoarthritis of the knee. In each study, diclofenac (Pennsaid or Voltaren Emugel) was superior to placebo in providing relief, with only “minor local irritation and no significant systemic adverse events. In a 12-week head-to-head comparison of oral diclofenac with topical diclofenac (Pennsaid Lotion), their effectiveness was comparable. But side effects like nausea, indigestion, stomach pain, and liver damage were much more likely to occur with the oral NSAID.
Pennsaid Lotion is interesting because the formulation relies on DMSO (dimethyl sulfoxide) to help get the drug through the skin and into the area of the joint where pain relief is desired. DMSO is a solvent that is uniquely able to penetrate the skin and carry medications with it. We have long wondered why drug companies were not using DMSO to facilitate absorption. Now the makers of Pennsaid have done just that.
So, how can you get topical NSAIDs? If you were in Australia you could purchase products like piroxicam (Feldene Gel), ibuprofen (Nurofen Gel), ketoprofen (Orudis Gel), and diclofenac (Voltaren Emulgel) over the counter without a prescription. At this time that is impossible in the United States. Nevertheless, it is possible to purchase oral ibuprofen and ketoprofen over the counter. That means a compounding pharmacist (one who mixes raw ingredients into finished products) can legally purchase ibuprofen or ketoprofen powder, make a cream or a gel, sell it to you without a prescription.
An alternative would be to shop online for one of the brands mentioned above. Since they are nonprescription in many countries, you may be able to purchase them and not have US Customs give you any problems. One final option, and our number one recommendation, is to have a US physician write a prescription for Pennsaid. This topical form of diclofenac has been tested in several clinical trials and found to produce long-lasting relief from osteoarthritis. You would then need to contact a Canadian pharmacy online or by phone to have the prescription filled. Since this drug is not available.
Pennsaid Lotion (diclotenat)
This topical NSAID has been shown to provide lasting relief from the pain and inflammation of osteoarthritis. It may produce some skin irritation, but does not appear to cause significant systemic toxicity, as oral diclofenac does.
Side effects: Skin dryness, flakiness, and rash.
Downside: Not available in the United States. Available by prescription in Canada, Finland, Iceland, Italy, Greece, Portugal, the United Kingdom, and elsewhere.
Cost: Approximately $60 to $120 per month.