Finasteride is a medication primarily used to treat benign prostatic hyperplasia (BPH) and male pattern hair loss (androgenetic alopecia). It belongs to a class of drugs called 5-alpha reductase inhibitors, which work by decreasing the production of dihydrotestosterone (DHT). DHT is a hormone that contributes to prostate enlargement and hair follicle miniaturization. By reducing DHT levels, finasteride can alleviate urinary symptoms associated with BPH and promote hair regrowth and prevent further hair loss. Finasteride is available in two main dosages: 5mg tablets (Proscar) for BPH and 1mg tablets (Propecia) for hair loss.
Originally developed by Merck, finasteride gained FDA approval for BPH in 1992 and for male pattern hair loss in 1997. While Merck initially marketed finasteride under the brand names Proscar and Propecia, the drug is now also available as a generic medication. Several manufacturers produce generic versions, including Accord Healthcare, Mylan, and Aurobindo Pharma. A month's supply of generic finasteride typically ranges from $20 to $60, but can be as low as $5 with insurance. Propecia, the brand-name version, generally costs more, ranging from $100 to $150 per month. Finasteride is available by prescription only.
