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Bontril SR

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Bontril SR

Bontril SR Side Effects Center

Medical Editor: John P. Cunha, DO, FACOEP

Bontril SR (phendimetrazine tartrate) is used as a short-term supplement to diet and exercise in the treatment of obesity. It is a sympathomimetic amine, which is similar to an amphetamine. Common side effects include dizziness, dry mouth, difficulty sleeping, irritability, nausea, vomiting, diarrhea, or constipation.

The recommended dose of Bontril SR is one Slow-Release Capsule (105 mg) in the morning, taken 30-60 minutes before the morning meal. Bontril SR may interact with monoamine oxidase inhibitors (MAOIs), insulin and other diabetes drug therapies, guanethidine, or tricyclic antidepressants. Tell your doctor all medications and supplements you use. During pregnancy, Bontril SR should be used only when prescribed. It is not recommended for use near the expected delivery date because of possible harm to the fetus. Infants born to mothers who have been using this medication may have withdrawal symptoms such as irritability or extreme tiredness. Tell your doctor if you notice symptoms in your newborn. It is unknown if this drug passes into breast milk. Consult your doctor before breastfeeding. Withdrawal symptoms may occur if you suddenly stop taking this medication.

Our Bontril SR (phendimetrazine tartrate) Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

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.

What is Patient Information in Detail?

Easy-to-read and understand detailed drug information and pill images for the patient or caregiver from Cerner Multum.

Bontril SR in Detail - Patient Information: Side Effects

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 entire detailed patient monograph for Bontril SR (Phendimetrazine Tartrate Slow Release Capsules) »

What is Patient Information Overview?

A concise overview of the drug for the patient or caregiver from First DataBank.

Bontril SR Overview - Patient Information: Side Effects

SIDE EFFECTS: Dizziness, dry mouth, difficulty sleeping, irritability, nausea, vomiting, diarrhea, or constipation may occur. If these effects persist or worsen, notify your doctor or pharmacist promptly.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Tell your doctor immediately if any of these unlikely but serious side effects occur: fast/irregular/pounding heartbeat, mental/mood changes (e.g., agitation, uncontrolled anger, hallucinations, nervousness), uncontrolled muscle movements, change in sexual ability/interest.

Stop taking this medication and seek immediate medical attention if any of these rare but very serious side effects occur: severe headache, slurred speech, seizure, weakness on one side of the body, vision changes (e.g., blurred vision).

This drug may infrequently cause serious (sometimes fatal) lung or heart problems (pulmonary hypertension, heart valve problems). The risk increases with longer use of this medication and use of this drug along with other appetite-suppressant drugs/herbal products. If you notice any of the following unlikely but very serious side effects, stop taking this medication and consult your doctor or pharmacist immediately: chest pain, difficulty breathing with exercise, decreased ability to exercise, fainting, swelling of the legs/ankles/feet.

A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any of the following symptoms of a serious allergic reaction: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the US -

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

Read the entire patient information overview for Bontril SR (Phendimetrazine Tartrate Slow Release Capsules)»

What is Prescribing information?

The FDA package insert formatted in easy-to-find categories for health professionals and clinicians.

Bontril SR FDA Prescribing Information: Side Effects
(Adverse Reactions)

SIDE EFFECTS

Cardiovascular: Palpitation, tachycardia, elevation of blood pressure.

Central Nervous System: Overstimulation, restlessness, dizziness, insomnia, tremor, headache; rarely psychotic episodes at recommended doses, agitation, flushing, sweating, blurring of vision.

Gastrointestinal: Dryness of the mouth, diarrhea, constipation, nausea, stomach pain.

Genitourinary: Changes in libido, urinary frequency, dysuria.

Drug Abuse And Dependence

Controlled Substance: Phendimetrazine is a Schedule lll controlled substance.

Dependence: Phendimetrazine tartrate is related chemically and pharmacologically to the amphetamines. Amphetamines and related stimulant drugs have been extensively abused, and the possibility of abuse of phendimetrazine should be kept in mind when evaluating the desirability of including a drug as part of a weight reduction program. Abuse of amphetamines and related drugs may be associated with intense psychological dependence and severe social dysfunction. There are reports of patients who have increased the dosage to many times that recommended. Abrupt cessation following prolonged high dosage administration results in extreme fatigue and mental depression; changes are also noted on the sleep EEG. Manifestations of chronic intoxication with anorectic drugs include severe dermatoses, marked insomnia, irritability, hyperactivity and personality changes. The most severe manifestation of chronic intoxications is psychosis, often clinically indistinguishable from schizophrenia.

Read the entire FDA prescribing information for Bontril SR (Phendimetrazine Tartrate Slow Release Capsules) »

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Bontril SR - User Reviews

Bontril SR User Reviews

Now you can gain knowledge and insight about a drug treatment with Patient Discussions.

Here is a collection of user reviews for the medication Bontril SR sorted by most helpful. Patient Discussions FAQs

Report Problems to the Food and Drug Administration

 

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.


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