Patient Information about Propecia®
What is male pattern hair loss?
A warning about Propecia and pregnancy
What are the possible side effects of Propecia?
PROPECIA is used for the treatment of male pattern hair loss on the vertex and the anterior mid-scalp area.
PROPECIA is for use by MEN ONLY and should NOT be used by women or children.
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. These changes typically begin gradually in men in their 20s.
Doctors believe male pattern hair loss is due to heredity and is dependent on hormonal effects. Doctors refer to this type of hair loss as androgenetic alopecia.
Follow your doctor’s instructions.
• Take one tablet by mouth each day.
• You may take PROPECIA with or without food.
• If you forget to take PROPECIA, do not take an extra tablet. Just take the next tablet as usual.
PROPECIA will not work faster or better if you take it more than once a day.
• PROPECIA is for the treatment of male pattern hair loss in MEN ONLY and should not be taken by women or children.
• Anyone allergic to any of the ingredients.
If a women who is pregnant with a male baby absorbs the active ingredient in PROPECIA, either by swallowing or through the skin, it may cause abnormalities of a male baby’s sex organs. If a woman who is pregnant comes into contact with the active ingredient in PROPECIA, a doctor should be consulted. PROPECIA tablets are coated and will prevent contact with the active ingredient during normal handling, provided that the tablets are not broken or crushed.
Like all prescription products, PROPECIA may cause side effects. In clinical studies, side effects from PROPECIA were uncommon and did not affect most men. A small number of men experienced certain sexual side effects. These men reported one or more of the following: less desire for sex; difficulty in achieving an erection; and, a decrease in the amount of semen. Each of these side effects occurred in less than 2% of men. These side effects went away in men who stopped taking PROPECIA. They also disappeared in most men who continued taking PROPECIA.
The active ingredient in PROPECIA is also used by older men at a five-times higher dose to treat enlargement of the prostate. Some of these men reported other side effects, including problems with ejaculation, breast swelling and/or tenderness and allergic reactions such as lip swelling and rash. In clinical studies with PROPECIA, these side effects occurred as often in men taking placebo as in those taking PROPECIA.
Tell your doctor promptly about these or any other unusual effects.
Keep PROPECIA in the original container and keep the container closed. Store it in a dry place at room temperature. PROPECIA tablets are coated and will prevent contact with the active ingredient during normal handling, provided that the tablets are not broken or crushed.
Do not give your PROPECIA tablets to anyone else. It has been prescribed only for you. Keep PROPECIA and all medications out of the reach of children.

Issued April 1997
FOSAMAX is a registered trademark of Merck & Co., Inc.