Phentermine is used, in combination with diet and exercise, to help you lose weight. It works by decreasing your appetite. This medication is sometimes prescribed for other uses; Consult your physician or pharmacist for more information.

Direction

This medication is best taken on an empty stomach one hour before meals. Sustained-release or long acting products must be swallowed whole. Crushing or chewing them will destroy the long action and may cause increased side effects. Because this medication may cause sleeplessness, avoid taking a dose late in the day. Take this medication as prescribed. Do not take it more often or longer than directed. It is usually taken for 8 to 12 weeks. Use in combination with other appetite suppressant medicine is generally not recommended. Consult your doctor before such use.

Side Effect

Blurred vision, dizziness, dry mouth, sleeplessness, irritability, stomach upset or constipation may occur the first few days as your body adjusts to the medication. If these effects persist or become bothersome, inform your doctor. Notify your doctor if you experience: chest pain, nervousness, pounding heart, difficulty urinating, mood changes, breathing difficulties, swelling. If this medication makes you dizzy or lightheaded, avoid driving or engaging in activities requiring alertness. If you notice other effects not listed above, contact your doctor or pharmacist.

Precaution

Tell your doctor your complete medical history, especially if you have: high blood pressure, an over-active thyroid, glaucoma, diabetes, emotional problems. This medication can be habit forming and must be used with caution. Alcohol can increase unwanted side effects of dizziness. Limit alcohol use. This drug is not recommended for use in children. Consult your doctor or pharmacist for further information. This medication should be used only when clearly needed during pregnancy. Discuss the risk and benefits with your doctor. This drug may be excreted into breast milk. You may have to stop nursing or stop using this drug. Consult your doctor before breast-feeding.