Finasteride: What It Does and Who It Helps

Finasteride is a prescription drug most people use for male pattern hair loss and enlarged prostate (BPH). It lowers DHT, a hormone that shrinks hair follicles and fuels prostate growth. If you're wondering whether it can help you, this page breaks down how it works, what to expect, and how to use it safely.

How finasteride works and typical dosing

Finasteride blocks the enzyme 5-alpha-reductase, which turns testosterone into DHT. Less DHT usually means slower hair loss and, for men with BPH, smaller prostate symptoms like easier urination. For hair loss, doctors commonly prescribe 1 mg once daily. For BPH, the usual dose is 5 mg once daily. Don’t change dose without talking to your doctor.

Expect results slowly. For hair, most people notice less shedding after 3 months and visible thickening around 6–12 months. For BPH, symptom improvement can show up in weeks but may take a few months for full effect.

Side effects, risks, and who should avoid it

Common side effects include decreased libido, erectile dysfunction, and reduced ejaculate volume. These occur in a small percentage of users and often improve after stopping the drug, but some people report longer-lasting issues. Other rare risks include mood changes. If you have depression or notice mood changes, tell your doctor.

Finasteride is not for women, especially pregnant women, because it can harm a male fetus. Women of childbearing age should avoid handling broken tablets. Men planning to father a child should discuss concerns with their doctor — fertility effects are uncommon but worth checking if you have worries.

Finasteride can interact with other drugs. Always give your prescriber a full medication list. Your doctor may monitor PSA (prostate-specific antigen) levels if you take finasteride for BPH, since the drug lowers PSA and can mask prostate cancer signs.

Thinking about stopping finasteride? Hair gains usually reverse within 6–12 months after stopping. For BPH, symptoms can return too. Plan with your doctor before stopping so you know what to expect.

Safe buying and practical tips

Only buy finasteride from a licensed pharmacy with a valid prescription. Avoid suspicious online shops that don’t require a prescription — fake or weak pills are common. Look for clear contact info, verified reviews, and secure payment. If you order online, check that the packaging is sealed and the tablets look consistent.

Keep a simple checklist: get a prescription, confirm pharmacy licensing, read the leaflet, and start with the lowest effective dose. Track side effects for the first few months and have a follow-up with your prescriber at 3 months.

Questions? Ask your clinician about dosing, fertility concerns, and monitoring. Finasteride can help, but the right choice depends on your goals and health history.