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Adipex-P, Fastin, Ionamin, Obenix, Obephen, Oby-Cap, Oby-Trim, Panshape M, Phentercot, Phentride, Pro-Fast HS, Pro-Fast SA, Pro-Fast SR, Teramine, Zantryl, |Zantryl

Zantryl

Generic Name: phentermine (FEN ter meen)
Brand Names: Adipex-P, Fastin, Ionamin, Obenix, Obephen, Oby-Cap, Oby-Trim, Panshape M, Phentercot, Phentride, Pro-Fast HS, Pro-Fast SA, Pro-Fast SR, Teramine, Zantryl

What is phentermine?

Phentermine is a stimulant that is similar to an amphetamine. Phentermine is an appetite suppressant that affects the central nervous system.

Phentermine is used togther with diet and exercise to treat obesity (overweight) in people with risk factors such as high blood pressure, high cholesterol, or diabetes.

Phentermine may also be used for purposes other than those listed in this medication guide.

What is the most important information I should know about phentermine?

Taking phentermine 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 phentermine with any other diet medications without your doctor"s advice.

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

What should I discuss with my healthcare provider before taking phentermine?

Taking phentermine 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 phentermine with any other diet medications without your doctor"s advice.

• 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 phentermine, tell your doctor if you are allergic to any drugs, or if you have:

• problems with your thyroid,

• an anxiety disorder,

• epilepsy or another seizure disorder, or

• diabetes.

If you have any of these conditions, you may not be able to use phentermine, or you may need a dosage adjustment or special tests during treatment.

How should I take phentermine?

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.

Phentermine should be taken only for a short time, such as a few weeks.

You may have withdrawal symptoms when you stop using phentermine after using it over a long period of time. Do not stop using this 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 phentermine in the evening because it may cause sleep problems (insomnia).

Stop taking phentermine if you have increased hunger or if you otherwise think the medication is not working properly. Do not take more phentermine for an increased effect. Taking too much of this medication can cause serious, life-threatening side effects.

What happens if I miss a dose?

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?

Symptoms of a phentermine overdose 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 phentermine?

Phentermine side effects

• chest pain, swelling in your ankles or feet, feeling light-headed, fainting, or feeling short of breath, even with mild exertion;

• fast or uneven heartbeat;

• unusual thoughts or behavior, feeling restless or confused; or

• increased blood pressure (severe headache, blurred vision, trouble concentrating, chest pain, numbness, seizure).

Less serious side effects may be more likely to occur, such as:

• feeling nervous or anxious;

• headache, dizziness, tremors;

• trouble sleeping (insomnia);

• dry mouth or an unpleasant taste in your mouth;

• diarrhea or constipation; or

• itching.

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.

What other drugs will affect phentermine?

Before taking phentermine, 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).

If you are using any of these drugs, you may not be able to use phentermine, or you may need dosage adjustments or special tests during treatment.

There may be other drugs not listed that can affect phentermine. Tell your doctor about all the prescription and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor.

Where can I get more information?

• Your pharmacist has information about phentermine written for health professionals that you may read.

What does my medication look like?

Phentermine is available with a prescription under the brand names Adipex and Fastin. Other brand or generic formulations may also be available. Ask your pharmacist any questions you have about this medication, especially if it is new to you.

• Adipex-P 37.5 mg--white, oblong, scored tablets with blue speckles

• Adipex-P 37.5 mg--light-blue-and-white capsules with two blue bands

• Fastin 30 mg--blue-and-clear capsules with blue and white beads

• Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed
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