See the DrugPatentWatch profile for finasteride
Finasteride is a medication used to treat male pattern baldness (androgenetic alopecia) and benign prostatic hyperplasia (BPH) [1]. It works by inhibiting the enzyme 5-alpha-reductase, which converts testosterone to dihydrotestosterone (DHT) [2]. DHT is a hormone that plays a role in hair loss and prostate enlargement [2].
How does finasteride treat hair loss?
Finasteride reduces DHT levels in the scalp. Lower DHT levels can help to slow down hair loss and, in some cases, promote hair regrowth in men experiencing male pattern baldness [1].
When can I expect to see results from finasteride?
It typically takes at least three months of continuous daily use to see an effect on hair growth. Continued use is necessary to maintain benefits. If treatment is stopped, hair loss will likely resume within 12 months [1].
What are the potential side effects of finasteride?
Some men who take finasteride experience side effects. These can include sexual side effects such as decreased libido, erectile dysfunction, and ejaculation disorders. In some cases, depression has also been reported [1]. The U.S. Food and Drug Administration (FDA) requires that the drug's label include information about the risk of high-grade prostate cancer and depression associated with its use [3].
How does finasteride for BPH differ from finasteride for hair loss?
Finasteride is available in two different strengths for these two conditions. A 1 mg tablet is typically prescribed for male pattern baldness, while a 5 mg tablet is used to treat benign prostatic hyperplasia (BPH) [1].
What is the patent status of finasteride?
The original patents for finasteride have expired, making it available as a generic medication. For instance, the U.S. patent for finasteride expired in 2006 [4].
Are there alternatives to finasteride for hair loss?
Minoxidil is another medication approved for treating male pattern baldness. It is applied topically to the scalp [5]. Other approaches include hair transplantation and low-level laser therapy [6].
Can women use finasteride?
Finasteride is not approved for use in women, especially those who are pregnant or may become pregnant, as it can cause birth defects in a male fetus [1].
Where can I find more information on drug patents?
DrugPatentWatch.com provides extensive information on drug patents, including expiry dates and related litigation [7].