Propecia (finasteride) is commonly prescribed to treat male pattern baldness. This drug is not intended for women and has been reported to cause harm to an unborn baby. Pregnant women must not handle crushed tablets of Propecia. Do not take this medicine if you are allergic to its active ingredient (finasteride) or any other compounds. Side effects of Propecia are very rare and may include the following: allergic reaction (hives, itching, ejaculation problems, rash, swelling of the lips and face), testicular pain, breast tenderness. If any of these effects persist or worsen over time consult your doctor to avoid complications.
Propecia needs to be taken all the time; and three to four months are required to see stable results. However, if this medicine has not worked during the first 12 months it is unlikely to work at all. In that case talk to your doctor about an alternative. If you stop taking this medicine you will lose all the hair you have re-grown during the period of treatment within a year. Unless otherwise prescribed by your doctor take Propecia once a day at the same time. If you happen to miss a dose take it as soon as you remember. If it is almost time for another dose, take it without worrying about the one you missed.