Phentermine (Oral Route)

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Proper Use

Take this medicine only as directed by your doctor. Do not take more of it, do not take it more often, and do not take it for a longer time than your doctor ordered. If too much is taken, it may become habit-forming (causing mental or physical dependence).

This medicine is available in four forms: capsules, disintegrating tablets, extended-release capsules, and tablets. Ask your doctor which dosage form is right for you.

Swallow the extended-release capsule whole. Do not crush, break, or chew it.

If you are using the disintegrating tablet, make sure your hands are dry before removing the tablet from the bottle. Place the tablet on the top of your tongue immediately. It should melt quickly. After the tablet has melted, swallow or take a sip of water.

Take the disintegrating tablet with or without food.

Carefully follow your doctor's instructions for a reduced-calorie diet plan and regular exercise. Talk with your doctor before starting any exercise program.

To avoid trouble sleeping, take the last dose of the day about 4 to 6 hours before bedtime, unless your doctor tells you otherwise.

Dosing

The dose of this medicine will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.

The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.

• For treatment of obesity:
  • For oral dosage form (capsules):
    • Adults and teenagers 17 years of age and older—15 to 30 milligrams (mg) once a day, taken at approximately 2 hours after breakfast.
    • Children up to 16 years of age—Use is not recommended.
  • For oral dosage form (disintegrating tablets):
    • Adults and teenagers 17 years of age and older—One tablet once a day, taken in the morning.
    • Children up to 16 years of age—Use is not recommended.
  • For oral resin dosage form (extended-release capsules):
    • Adults and teenagers 16 years of age and older—One capsule once a day, taken before breakfast or 10 to 14 hours before sleeping.
    • Children up to 15 years of age—Use is not recommended.
  • For oral dosage form (tablets):
    • Adults and teenagers 17 years of age and older—One tablet or 37.5 milligrams (mg) once a day, taken before breakfast or 1 to 2 hours after breakfast. Some patients may need half-tablet or 18.75 mg daily or two times a day. Your doctor may adjust your dose as needed.
    • Children up to 16 years of age—Use is not recommended.

Missed Dose

If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.

Storage

Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.

Keep out of the reach of children.

Do not keep outdated medicine or medicine no longer needed.

Ask your healthcare professional how you should dispose of any medicine you do not use.

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