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Adipex-P

Last reviewed on RxList: 5/16/2016
Adipex-P Side Effects Center

Medical Editor: John P. Cunha, DO, FACOEP

Last reviewed on RxList 9/23/2016

Adipex-P (phentermine) is an appetite suppressant used in combination with diet and exercise for the short-term treatment of obesity. A generic version of Adipex-P is available. Side effects of Adipex-P include:

Adipex-P has been associated with pulmonary hypertension and defects in heart valves.

The recommended dose of Adipex-P is 30 mg once daily. Adipex-P may interact with alcohol, monoamine oxidase inhibitors (MAOIs), insulin or oral diabetes medications, blood pressure medications, or antidepressants. Tell your doctor all medications and supplements you use. Adipex-P is not recommended for use during pregnancy; weight loss during pregnancy can harm a fetus, even if you are overweight. Do not use Adipex-P if you are pregnant. Adipex-P passes into breast milk and may harm a nursing baby. Breastfeeding while taking Adipex-P is not recommended. Long-term use of Adipex-P may cause physical and psychological dependence. A withdrawal reaction consisting of excessive drowsiness, fatigue, tremors and depression may occur after prolonged use.

Our Adipex-P 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.

Adipex-P Consumer Information

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

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, chest pain, shortness of breath, uneven heartbeats, seizure).

Less serious side effects may include:

  • feeling restless or hyperactive;
  • headache, dizziness, tremors;
  • sleep problems (insomnia);
  • dry mouth or an unpleasant taste in your 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 Adipex-P (Phentermine Hydrochloride)

Adipex-P Professional Information

SIDE EFFECTS

The following adverse reactions are described, or described in greater detail, in other sections:

The following adverse reactions to phentermine have been identified:

Cardiovascular

Primary pulmonary hypertension and/or regurgitant cardiac valvular disease, palpitation, tachycardia, elevation of blood pressure, ischemic events.

Central Nervous System

Overstimulation, restlessness, dizziness, insomnia, euphoria, dysphoria, tremor, headache, psychosis.

Gastrointestinal

Dryness of the mouth, unpleasant taste, diarrhea, constipation, other gastrointestinal disturbances.

Allergic

Urticaria.

Endocrine

Impotence, changes in libido.

Read the entire FDA prescribing information for Adipex-P (Phentermine Hydrochloride)

Related Resources for Adipex-P

Read the Adipex-P User Reviews »

© Adipex-P Patient Information is supplied by Cerner Multum, Inc. and Adipex-P Consumer information is supplied by First Databank, Inc., used under license and subject to their respective copyrights.

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