Propecia is the only medication available on prescription as a treatment for hair loss. It contains the active ingredient finasteride and is clinically proven to stop hair loss and promote hair growth. Propecia is not an instant treatment and needs to be taken over a long period, with results usually becoming visible within three to six months. Visible hair regrowth is usually seen after around nine months. The positive effects of Propecia will continue for as long as you take the medication.
How Propecia works
Propecia’s active ingredient, finasteride, works to prevent the body from producing an androgen called dihydrotestosterone (DHT), which is a by-product of testosterone. Men who are genetically sensitive to DHT will experience hair loss. Testosterone is converted into DHT by an enzyme called type II 5-alpha reductase. By stopping DHT from being produced, finasteride can effectively stop the process of hair loss from continuing. This gives the hair follicles which have shrunk as a result of their exposure to DHT, can heal and, in some cases, grow new hairs.
Side effects of Propecia
There is a very small possibility that Propecia could cause some people to experience side effects, though they are considered uncommon. Those side effects that have been reported are most commonly associated with sex, such as a decreased libido, problems in gaining an erection and decreased amount of semen during ejaculation. However, clinical studies have shown that less than 2% of men taking Propecia experienced these kinds of effects. They also ceased when the affected individual stopped taking the medication.