Finasteride Works: How It Works, Explained Simply

Video Transcript

Finasteride is a prescription tablet used to treat male pattern hair loss. Male pattern hair loss is driven by a hormone called D H T, which causes sensitive follicles on the scalp to shrink over time. D H T is made from testosterone by an enzyme. Finasteride works by blocking that enzyme. With less D H T reaching the follicles, the shrinking process is slowed, and in many men the existing hair is better maintained. For some, hair also thickens over time. Like other treatments, it works gradually, over months, and its benefit depends on continued use. If it is stopped, D H T levels return to where they were, and the hair loss gradually resumes. Finasteride is approved for men. It is not for women who are, or may become, pregnant. That point is important. Exposure to the drug can affect the development of a male fetus, so pregnant women should not handle broken or crushed tablets. Some men experience side effects, including effects on sexual function. Because it is a prescription medicine, it is started and monitored with a doctor. This video is for general education only. It is not medical advice. Ask your doctor what's right for you.