Brand Names: Adipost, Bontril PDM, Bontril Slow Release, Melfiat

Generic Name: phendimetrazine (Pronunciation: fen di MEH tra zeen)

• What is phendimetrazine (Bontril SR)?
• What are the possible side effects of phendimetrazine (Bontril SR)?
• What is the most important information I should know about phendimetrazine (Bontril SR)?
• What should I discuss with my healthcare provider before taking phendimetrazine (Bontril SR)?
• How should I take phendimetrazine (Bontril SR)?
• What happens if I miss a dose (Bontril SR)?
• What happens if I overdose (Bontril SR)?
• What should I avoid while taking phendimetrazine (Bontril SR)?
• What other drugs will affect phendimetrazine (Bontril SR)?
• Where can I get more information?

What is phendimetrazine (Bontril SR)?

Phendimetrazine is similar to an amphetamine. Phendimetrazine stimulates the central nervous system (nerves and brain), which increases your heart rate and blood pressure and decreases your appetite.

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

Phendimetrazine may also be used for purposes not listed in this medication guide.

Bontril PDM

round, green/yellow, imprinted with B 35, V

Bontril Slow Release 105 mg-AMA

green/yellow, imprinted with A, 047

Bontril

green/yellow, imprinted with C, 8647

What are the possible side effects of phendimetrazine (Bontril SR)?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Stop using phendimetrazine and call your doctor at once if you have a serious side effect such as:

• feeling short of breath, even with mild exertion;
• chest pain, feeling like you might pass out;
• swelling in your ankles or feet;
• pounding heartbeats or fluttering in your chest;
• confusion or irritability, unusual thoughts or behavior;
• feelings of extreme happiness or sadness; or
• dangerously high blood pressure (severe headache, blurred vision, buzzing in your ears, anxiety, confusion, chest pain, shortness of breath, uneven heartbeats, seizure).

Less serious side effects may include:

• feeling restless or hyperactive;
• headache, dizziness, tremors;
• sleep problems (insomnia);
• flushing (warmth, redness, or tingly feeling);
• dry mouth;
• diarrhea or constipation, upset stomach; or
• increased or decreased interest in sex, impotence.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Read the Bontril SR (phendimetrazine tartrate slow release capsules) Side Effects Center for a complete guide to possible side effects »

What is the most important information I should know about phendimetrazine (Bontril SR)?

Phendimetrazine may cause blurred vision or impair your thinking or reactions. Be careful if you drive or do anything that requires you to be alert and able to see clearly.

Phendimetrazine may be habit-forming and should be used only by the person it was prescribed for. Keep the medication in a secure place where others cannot get to it.

Do not stop using phendimetrazine suddenly after long-term use, or you could have unpleasant withdrawal symptoms. Ask your doctor how to avoid withdrawal symptoms when you stop using phendimetrazine.

Do not crush, chew, break, or open the extended-release capsule. Swallow it whole. Breaking or opening the pill may cause too much of the drug to be released at one time.