Adipex-P

Adipex-P. Drug and Patient Information. Dosage. Overdose. Generic or Brand Adipex-P. For Professionals and Consumers.

World Map

Adipex-P is a stimulant that is similar to an amphetamine. It is an appetite suppressant that affects the central nervous system. Adipex-P is used togther with diet, exercise and behavioral modification to treat obesity (excessively overweight) in people with risk factors such as high blood pressure, high cholesterol, or diabetes. Adipex-P may also be used for other purposes not listed in this Adipex-P page.

Brand name: Adipex-P

Other brand names: Ionamin, Obenix, Oby-Cap, Teramine, Zantryl

Generic name: Phentermine

 Adipex

Important information about Adipex-P

Taking Adipex-P together with other diet medications such as fenfluramine (Phen-Fen) or dexfenfluramine (Redux) can cause a rare fatal lung disorder called pulmonary hypertension. Do not take Adipex-P with any other diet medications without your doctor’s advice.

Adipex-P can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert. Avoid drinking alcohol. It can increase some of the side effects of Adipex-P.

Adipex-P may be habit-forming and should be used only by the person it was prescribed for. Keep track of how many pills have been used from each new bottle of this medicine. Adipex-P is a drug of abuse and you should be aware if any person in the household is using this medicine improperly or without a prescription.

You may have withdrawal symptoms, such as depression and extreme tiredness, when you stop using Adipex-P after a long period of use. Do not stop using Adipex-P suddenly without first talking to your doctor. You may need to use less and less before you stop the medication completely.

Before taking Adipex-P

Do not take Adipex-P if you have used an MAO inhibitor such as isocarboxazid (Marplan), phenelzine (Nardil), rasagiline (Azilect), selegiline (Eldepryl, Emsam), or tranylcypromine (Parnate) within the past 14 days. Serious, life-threatening side effects can occur if you take Adipex-P before the MAO inhibitor has cleared from your body.

Taking Adipex-P together with other diet medications such as fenfluramine (Phen-Fen) or dexfenfluramine (Redux) can cause a rare fatal lung disorder called pulmonary hypertension. Do not take Adipex-P with any other diet medications without your doctor’s advice.

Do not take Adipex-P if you are allergic to Adipex-P or other stimulants, or if you have:

heart disease or high blood pressure;
arteriosclerosis (hardening of the arteries);
an overactive thyroid;
glaucoma;
if you are in an agitated state; or
if you have a history of drug or alcohol abuse.

Before taking Adipex-P, tell your doctor if you are allergic to any drugs, or if you have:

a thyroid disorder;
anxiety disorder;
diabetes; or
epilepsy or another seizure disorder.

If you have any of these conditions, you may need a dose adjustment or special tests during treatment.

It is not known whether Adipex-P will harm an unborn baby. Do not take Adipex-P without telling your doctor if you are pregnant. It is also not known whether Adipex-P passes into breast milk or if it could harm a nursing baby. Do not take Adipex-P without telling your doctor if you are breast-feeding a baby.

Do not give Adipex-P to anyone younger than 16 years old without the advice of a doctor. Adipex-P may be habit-forming and should be used only by the person it was prescribed for. Adipex-P should never be shared with another person, especially someone who has a history of drug abuse or addiction. Keep the medication in a secure place where others cannot get to it.

How should I take Adipex-P?

Take this medication exactly as it was prescribed for you. Do not take the medication in larger amounts, or take it for longer than recommended by your doctor. Follow the directions on your prescription label.

It is best to take Adipex-P on an empty stomach before breakfast, or at least 10 to 14 hours before bedtime. Do not take more Adipex-P for an increased effect. Taking too much of this medication can cause serious, life-threatening side effects. Do not crush, chew, break, or open an extended-release capsule. Swallow the pill whole.
It is specially made to release medicine slowly in the body. Breaking or opening the pill would cause too much of the drug to be released at one time.

Adipex-P should be taken only for a short time, such as a few weeks.

Taking high doses of Adipex-P over long periods of time can cause severe skin problems, sleep problems (insomnia), personality changes, and feeling hyperactive or irritable.

Stop taking Adipex-P if you have increased hunger or if you otherwise think the medication is not working properly.

You may have withdrawal symptoms when you stop using Adipex-P after a long period of use. Do not stop using the medication suddenly without first talking to your doctor. You may need to use less and less before you stop the medication completely.

Do not take Adipex-P in the evening because it may cause sleep problems (insomnia).

Storage instructions for Adipex-P

Store Adipex-P at room temperature away from moisture and heat. Keep track of how many pills have been used from each new bottle of this medicine. Adipex-P is a drug of abuse and you should be aware if any person in the household is using this medicine improperly or without a prescription.

What happens if I miss a dose of Adipex-P?

Take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and take the medicine at your next regularly scheduled time. Do not take extra medicine to make up the missed dose.

What happens if I overdose on Adipex-P?

Seek emergency medical attention if you think you have used too much of this medication. An overdose of Adipex-P can be fatal.

Overdose symptoms may include confusion, hallucinations, feeling restless or aggressive, nausea, vomiting, diarrhea, stomach pain, irregular heartbeat, tremors, rapid breathing, confusion, hallucinations, feeling light-headed, fainting, or seizure (convulsions).

What should I avoid while taking Adipex-P?

Avoid drinking alcohol. It can increase some of the side effects of Adipex-P. Adipex-P can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert.

Adipex-P 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.

Stop using Adipex-P and call your doctor at once if you have any of these serious side effects:

feeling short of breath, even with mild exertion;
swelling, rapid weight gain;
chest pain, fast or uneven heartbeat, feeling like you might pass out;
unusual thoughts or behavior, feeling restless or confused; 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 of Adipex-P may include:

feeling nervous or anxious;
headache, dizziness, tremors;
trouble sleeping (insomnia);
dry mouth or an unpleasant taste in your mouth;
diarrhea or constipation; or
itching.

This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect.

What other drugs will affect Adipex-P?

Before taking Adipex-P, tell your doctor if you are using any of the following drugs:

medicines to treat high blood pressure;
insulin or diabetes medication you take by mouth;
guanadrel (Hylorel), guanethidine (Ismelin);
antidepressants such as citalopram (Celexa), escitalopram (Lexapro), fluoxetine (Prozac, Sarafem), fluvoxamine (Luvox), paroxetine (Paxil), or sertraline (Zoloft); or
antidepressants such as amitriptyline (Elavil, Etrafon), amoxapine (Ascendin), clomipramine (Anafranil), desipramine (Norpramin), doxepin (Sinequan), imipramine (Janimine, Tofranil), nortriptyline (Pamelor), protriptyline (Vivactil), or trimipramine (Surmontil).