Phentermine is a stimulant similar to an amphetamine. It acts as an appetite suppressant by affecting the central nervous system.

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

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  • Adipex-P, Oby-Cap, Suprenza, T-Diet, Zantryl
  • Rare
    Seeing, hearing, or feeling things that are not there
    severe mental changes
    Incidence not known
    Chest pain
    decreased ability to exercise
    fast, irregular, pounding, or racing heartbeat or pulse
    numbness or tingling in the arms or legs
    swelling of the feet or lower legs
    trembling or shaking of the legs, arms, hands, or feet
    trouble breathing
    trouble with thinking, speaking, or walking
    Some phentermine side effects may not need any medical attention. As your body gets used to the medicine these side effects may disappear. Your health care professional may be able to help you prevent or reduce these side effects, but do check with them if any of the following side effects continue, or if you are concerned about them:

    Incidence not known
    Decreased interest in sexual intercourse
    difficulty having a bowel movement (stool)
    dry mouth
    false or unusual sense of well-being
    hives or welts
    inability to have or keep an erection
    increased in sexual ability, desire, drive, or performance
    increased interest in sexual intercourse
    loss in sexual ability, desire, drive, or performance
    redness of the skin
    skin rash
    unpleasant taste
  • (oral capsule, oral tablet, oral capsule, extended release, oral tablet, disintegrating, compounding powder)