Propecia is a prescription drug that works by preventing the conversion of testosterone to dihydrotestosterone (DHT) in the body. The latter is often blamed for the actual process of hair loss in males, manifesting itself with thinning of the hair in particular areas of the scalp - mainly vertex and anterior mid-scalp area. If you ever had an allergic reaction to this drug or dutasteride (brand name Avodart) tell your doctor about that in advance as the chances of an allergic reaction when taking Propecia are quite high. Let your doctor know if you have any of the following conditions: liver disease, stricture of the urethra, bladder muscle disorder, prostate cancer, inability to urinate, or any others that may interfere with the treatment.
While taking Propecia you should watch out for any new symptoms appearing. For instance, if you notice pain, nipple discharge, breast lumps or any other breast changes, contact your doctor as soon as possible as these may be the signs of developing breast cancer. The active ingredient of this drug - finasteride - can be absorbed through skin and cause harm to an unborn baby if handled by a pregnant woman. If a woman comes into contact with a crushed tablet of Propecia, wash the area affected with soapy water and contact your health care provider as soon as possible.