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Adipex-P

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Adipex-P

Adipex-P

Adipex-P Side Effects Center

Pharmacy Author: Omudhome Ogbru, PharmD
Medical Editor: Melissa Conrad Stöppler, MD

Adipex-P (phentermine) is a drug that suppresses appetite. A generic version is available. Adipex-P is combined with diet and exercise for the short-term treatment of obesity. Side effects of Adipex-P include nausea, vomiting, diarrhea, dry mouth, constipation, an unpleasant taste, hives, impotence, palpitations, high blood pressure, and palpitations. Hyperactivity, insomnia, restlessness, tremor, and dizziness may also occur. Adipex-P has been associated with pulmonary hypertension and defects in heart valves. 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.

The recommended dose of Adipex-P is 30 mg once daily. Combining Adipex-P with tricyclic antidepressants or monoamine oxidase inhibitors (MAOIs) may result in high blood pressure and other serious reactions. Use of Adipex-P during pregnancy has not been adequately evaluated. It is not known whether Adipex-P is excreted in human breast milk.

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.

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.

Adipex-P in Detail - Patient Information: Side Effects

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, 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);
  • 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) »

What is Patient Information Overview?

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

Adipex-P 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 Adipex-P (Phentermine Hydrochloride)»

What is Prescribing information?

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

Adipex-P FDA Prescribing Information: Side Effects
(Adverse Reactions)

SIDE EFFECTS

Cardiovascular: Primary pulmonary hypertension and/or regurgitant cardiac valvular disease (see WARNINGS), palpitation, tachycardia, elevation of blood pressure.

Central Nervous System: Overstimulation, restlessness, dizziness, insomnia, euphoria, dysphoria, tremor, headache; rarely psychotic episodes at recommended doses.

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) »

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Adipex-P - User Reviews

Adipex-P 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 Adipex-P 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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