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Didrex, |benzphetamine Benzphetamine Hydrochloride

benzphetamine

Generic Name: benzphetamine (benz FET ah meen)
Brand Names: Didrex

What is benzphetamine?

Benzphetamine is a sympathomimetic amine, which is similar to an amphetamine. It is also known as an "anorectic" or "anorexigenic" drug. Benzphetamine stimulates your central nervous system (nerves and brain), which increases your heart rate and blood pressure and decreases your appetite.

Benzphetamine is used as a short-term supplement to diet and exercise in the treatment of obesity.

Benzphetamine may also be used for purposes other than those listed in this medication guide.

What is the most important information I should know about benzphetamine?

Who should not take benzphetamine?

• have heart disease or high blood pressure;

• have arteriosclerosis (hardening of the arteries);

• have glaucoma;

• have taken a monoamine oxidase inhibitor (MAOI) such as isocarboxazid (Marplan), tranylcypromine (Parnate), or phenelzine (Nardil) in the last 14 days; or

• have a history of drug or alcohol abuse.

Before taking this medication, tell your doctor if you have

• problems with your thyroid,

• an anxiety disorder,

• epilepsy or another seizure disorder, or

• diabetes.

You may not be able to take benzphetamine, or you may require a lower dose or special monitoring during treatment if you have any of the conditions listed above.

How should I take benzphetamine?

Take benzphetamine exactly as directed by your doctor. If you do not understand these directions, ask your pharmacist, nurse, or doctor to explain them to you.

Do not take benzphetamine in the evening because it may cause insomnia.

What happens if I miss a dose?

What happens if I overdose?

Symptoms of a benzphetamine overdose include restlessness, tremor, rapid breathing, confusion, hallucinations, panic, aggressiveness, nausea, vomiting, diarrhea, an irregular heartbeat, and seizures.

What should I avoid while taking benzphetamine?

Do not take benzphetamine late in the day. A dose taken too late in the day can cause insomnia.

Benzphetamine side effects

• an allergic reaction (difficulty breathing; closing of your throat; swelling of your lips, tongue, or face; or hives);

• an irregular heartbeat or very high blood pressure (severe headache, blurred vision); or

• hallucinations, abnormal behavior, or confusion.

Other, less serious side effects may be more likely to occur. Continue to take benzphetamine and talk to your doctor if you experience

• restlessness or tremor,

• anxiety or nervousness

• headache or dizziness,

• insomnia,

• dry mouth or an unpleasant taste in your mouth,

• diarrhea or constipation, or

• impotence or changes in your sex drive.

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.

What other drugs will affect benzphetamine?

You cannot take benzphetamine if you have taken a monoamine oxidase inhibitor (MAOI) such as isocarboxazid (Marplan), tranylcypromine (Parnate), or phenelzine (Nardil) in the last 14 days.

Changes in insulin and other diabetes drug therapies may be necessary during treatment with benzphetamine.

Benzphetamine may reduce the effects of guanethidine (Ismelin). This could lead to an increase in blood pressure. Tell your doctor if you are taking guanethidine.

Before taking this medication, tell your doctor if you are taking a tricyclic antidepressant such as amitriptyline (Elavil), amoxapine (Asendin), doxepin (Sinequan), nortriptyline (Pamelor), imipramine (Tofranil), clomipramine (Anafranil), protriptyline (Vivactil), or desipramine (Norpramin). These drugs may decrease the effects of benzphetamine.

Drugs other than those listed here may also interact with benzphetamine. Talk to your doctor and pharmacist before taking any prescription or over-the-counter medicines.

Where can I get more information?

• Your pharmacist has more information about benzphetamine written for health professionals that you may read.

What does my medication look like?

Benzphetamine is available with a prescription under the brand name Didrex. Other brand or generic formulations may also be available. Ask your pharmacist any questions you have about this medication, especially if it is new to you.

• Didrex 25 mg--yellow tablets

• Didrex 50 mg--peach-colored tablets

• Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed
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