Propecia prevents the conversion of testosterone to dihydrotestosterone (DHT) in the body.

Propecia is used for the treatment of male pattern hair loss on the vertex and the anterior mid-scalp area. Male pattern hair loss is a common condition in which men experience thinning of the hair on the scalp. Often, this results in a receding hairline and/or balding on the top of the head. Propecia is for use by men only and should not be used by women or children.

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  • Propecia, Proscar
  • More common
    cold sweats
    dizziness, faintness, or lightheadedness when getting up from a lying or sitting position
    Less common
    Bloating or swelling of the face, arms, hands, lower legs, or feet
    breast enlargement and tenderness
    hives or welts
    itchy skin
    rapid weight gain
    redness of the skin
    skin rash
    swelling of the lips and face
    tingling of the hands or feet
    unusual weight gain or loss
    Incidence not known
    Clear or bloody discharge from the nipple
    dimpling of the breast skin
    inverted nipple
    lump in the breast or under the arm
    persistent crusting or scaling of the nipple
    redness or swelling of the breast
    sore on the skin of the breast that does not heal
    Some finasteride 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:

    More common
    Decreased interest in sexual intercourse
    inability to have or keep an erection
    loss in sexual ability, desire, drive, or performance
    Less common
    Runny nose
    sleepiness or unusual drowsiness
    stuffy nose
    Less common or rare
    Abdominal or stomach pain
    back pain
    decreased amount of semen
    Incidence not known
    Testicular pain
  • (finasteride) tablet, film coated