Propecia Active Ingredients:
Finasteride

Propecia Therapeutic actions:
Propecia (Finasteride) blocks an enzyme called 5-alpha-reductase, which is necessary to change testosterone to another hormone that causes the prostate to grow. As a result, the size of the prostate is decreased. The effect of Propecia on the prostate lasts only as long as the medicine(propecia) is taken. If it is stopped, the prostate begins to grow again.

Propecia reduces DHT, a key cause of hair loss, by inhibiting the formation of DHT in scalp.
Lowering DHT appears to inhibit the further shrinking of affected hair follicles. DHT is a substance in the body that can shrink the hair follicle until it no longer produces visible hair.
Propecia blocks the formation of DHT and, in this way, appears to interrupt the development of male pattern hair loss.

What is Propecia (Finasteride) used for?:
Propecia treats urinary problems caused by an enlarged prostate gland (benign prostatic hyperplasia, BPH). Propecia is also used to lower the risk of needing surgery to treat BPH.

Propecia is the only once-a-day pill approved by the FDA for the treatment of certain types of male pattern hair loss in men. Propecia reduces DHT, a key cause of hair loss.

The main difference of Propecia products
Propecia' active ingredient  - Finasteride. Proscar (Fincar, Prosterid) contains Finasteride 5 mg and is used to treat only diseases of the prostate. 1 mg of Finasteride in Propecia have beneficial effect on hair growth.  Thus applying 1/5 of Propecia products (Fincar, Proscar, Prosterid), you will deal with your hair loss, but in case you are using one pill of Fincar, Proscar, Prosterid every day, you will cure the prostate diseases.

Propecia (Finasteride) Contraindications and cautions:
Propecia is contraindicated in patients known to be hypersensitive to Finasteride. Finasteride use is contraindicated in women when they are or may potentially be pregnant.

Propecia (Finasteride) Side effects:
Propecia (Finasteride)serious allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat; breast lumps, pain, nipple discharge, or other breast changes. These may be signs of male breast cancer.

Propecia (Finasteride) less serious side effects: feeling like you might pass out; swelling in your hands or feet; pain in the testicles; impotence, loss of interest in sex, or trouble having an orgasm; abnormal ejaculation; swelling or tenderness in your breasts; dizziness, weakness; headache; runny nose; or skin rash.

Propecia (Finasteride) Interactions:
No drug interactions of clinical importance have been identified.