Phentermine 37.5: Dosage, Uses & Important Information

Phentermine belongs to a class of drugs called anorectics, which are medications that cause patients to experience a reduction in appetite. Your doctor may prescribe phentermine tablets, which contain 37.5 mg of phentermine hydrochloride, on a short-term basis (three to six weeks) to help you lose weight while launching a diet and exercise program. For the best results, follow the medication's instructions for use.

Things You'll Need

• Phentermine 37.5 prescription tablets

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Instructions

• 1

  Take the medication three times per day, 30 minutes before a meal, after your doctor prescribes phentermine. Follow any other directions recommended by your doctor.

• 2

  Take extended-release phentermine tablets in the morning. It is important not to crush, split or chew extended-release medications. You must swallow them whole.

• 3

  Follow your doctor's instructions regarding adjunct diet and exercise weight-loss interventions while taking phentermine.

• 4

  Talk to your doctor about possible side effects, including diarrhea, constipation, dry mouth, vomiting or an unpleasant taste in your mouth.These side effects will continue unless you discontinue use of phentermine.

• 5

  Report potentially dangerous side effects to your doctor immediately. They include: Chest pain, shortness of breath, dizziness and lightheadedness, hypertension, restlessness, insomnia, tremors, heart palpitations, swollen ankles or feet and/or an inability to perform your usual activities of daily living.

• 6

  Discontinue phentermine if you build a tolerance to its effects. Do not take increased doses of the medication to overcome this tolerance.

• 7

  Avoid drinking alcohol while taking phentermine. Alcohol can increase the adverse side effects of the medication.