Phone

Drugs

Side Effects
Serious

Mental depression, nausea or vomiting, abdominal pain, trembling, over activity, rapid heartbeat, confusion, hallucinations, convulsions, coma, highly elevated blood pressure. Call your doctor at once.
Common

Irritability, nervousness, insomnia, mood changes including elation, euphoria, or a false sense of well-being.
Less Common

Irregular or pounding heartbeat, difficulties with urination; call your doctor at once. Blurred vision, dry mouth, unpleasant or metallic taste in the mouth, decreased sexual ability, increased sweating, diarrhea, headache. Notify your doctor if such symptoms persist.
Benzphetamine


Drug Class:
Appetite suppressant

Available OTC?: No

Available Generic?: Yes

Available In
Why Prescribed
How It Works
Range and Frequency
Onset of Effect
Duration of Action
Dietary Advice
Storage
Missed Dose
Stopping the Drug
Prolonged Use
Over 60
Driving and Hazardous Work
Alcohol
Pregnancy
Breast Feeding
Infants and Children
Overdose Symptoms
What to Do
Drug Interactions
Food Interactions
Disease Interactions


Available In
Tablets

Why Prescribed
For short-term use in a weight reduction program.

How It Works
Benzphetamine reduces appetite by acting on the satiety center in the brain.

Range and Frequency
To start, 25 to 50 mg once a day. Usually taken in midmorning or midafternoon. The dose can be increased up to 150 mg per day, taken in 3 doses, if necessary and if the patient can tolerate this dosage without severe side effects. The magnitude of the increased weight loss associated with benzphetamine is a fraction of a pound a week, with the weight loss greatest in the first weeks of therapy.

Onset of Effect
Within 1 to 2 hours.

Duration of Action
Up to 4 hours.

Dietary Advice
Take the drug 1 hour before or 2 hours after meals, in midmorning or midafternoon. The last dose should be taken at least 4 to 6 hours before bedtime, since this medicine may cause insomnia.

Storage
Store in a tightly sealed container away from heat, moisture, and direct light.

Missed Dose
If you miss a dose, take it if you remember within 2 hours. However, if more than 2 hours have passed, skip the missed dose and return to your regular schedule. Do not double the next dose.

Stopping the Drug
Take it as prescribed for the full treatment period. The decision to stop taking the drug should be made in consultation with your physician.

Prolonged Use
The dose should be reduced with prolonged use. Prolonged use may cause drug dependence. The maximum recommended duration of therapy is 8 to 12 weeks.

Over 60
Adverse reactions and side effects may be more common in older persons.

Driving and Hazardous Work
Don't drive or engage in hazardous work until you determine how the medicine affects you. It may cause dizziness or blurred vision.

Alcohol
Drink in strict moderation if at all while using this drug.

Pregnancy
Benzphetamine should not be taken during pregnancy because it may harm the fetus. A reliable form of birth control should be used while taking this medicine.

Breast Feeding
Benzphetamine passes into breast milk. It should not be taken while breast feeding.

Infants and Children
Benzphetamine should not be used in children under the age of 12.

Overdose Symptoms
Over activity, irritability, trembling, insomnia, rapid heartbeat, confusion, hallucinations, convulsions, coma.

What to Do
Call your doctor, emergency medical services (EMS), or the nearest poison control center immediately.

Drug Interactions
Benzphetamine should not be used with any other central nervous stimulant drug. It may decrease the effect of drugs for high blood pressure and increase the effect of antidepressants. Caution is necessary when urinary acidifiers or alkalizers are taken with benzphetamine. Avoid MAO inhibitors. Vitamin C supplements increase excretion and therefore decrease the effectiveness of this drug.

Food Interactions
Avoid beverages containing caffeine since they may increase the drug's effect of stimulating the central nervous system.

Disease Interactions
This medicine should not be taken by persons with advanced arteriosclerosis, moderate to severe high blood pressure, hyperthyroidism, or glaucoma. It should not be given to persons with a history of drug abuse. For people with diabetes, taking this medicine may affect the amount of insulin or oral antidiabetic medicines that must be taken.

Date Published: 04/13/2005
Previous  |  Next
> Printer-friendly Version