Male pattern baldness is medically called androgenetic alopecia. It accounts for 95% of all hair loss. In women, it appears as a diffuse thinning over most of the scalp. In men, it starts with a receding hairline that gradually develops over the top of the head. This hair loss is called androgenetic alopecia because the male hormones (androgens) and hereditary factors (genetic) that determine the loss of hair.

Specifically, the enzyme 5 alpha reductase converts the male hormone testosterone into a male hormone called Dihydrotestosterone (DHT). The DHT is believed to cause hair loss in those who are genetically disposed. DHT shrinks the hair follicle until it no longer grows visible hair.

Propecia (finasteride) works by blocking the enzyme 5 alpha reductase that lowers the levels of DHT in the body. This normalizes hair growth and reverses hair loss. The advantage of Propecia is that it selectively targets the appropriate hormone without causing undesirable changes in other hormones.

Propecia comes in tablet form and only the recommended dosage should be taken. Propecia Finasteride comes in the dose of 1mg and recommended dosage is 1 tablet taken once a day. Finasteride should be taken under proper medical guidance to avoid any side effects and to get best results for hair re-growth and stop further hair loss.

You may use it for 3 months or more before you notice an increase in hair growth and/or prevention of hair loss. If you haven't seen results within 12 months, you probably won't. You have to use it continuously for maximum benefit. If you stop taking it, you will likely lose the hair you have gained within 12 months.