Finasteride for male pattern hair loss is taken as one 1mg tablet once daily, at any consistent time, with or without food. Expect early signs of stabilization around 3 months and fuller results over 12-24 months of continuous use.
Dosing and how to take it
For male pattern hair loss (androgenetic alopecia), finasteride is prescribed as 1mg once daily. This dose lowers scalp dihydrotestosterone (DHT) — the hormone that drives follicle miniaturization — by roughly 60%, and serum DHT by around 70%. Higher doses do not meaningfully improve hair outcomes, so more is not better.
Practical points:
- Timing: take it at the same time each day. Morning or night both work; consistency matters more than the exact hour.
- Food: it can be taken with or without food.
- Missed dose: if you forget, take it when you remember the same day, but skip it if it is nearly time for the next dose. Do not double up.
- Handling: tablets are typically film-coated; women who are or may become pregnant should not handle crushed or broken tablets because of a risk to a developing male fetus.
Finasteride is a prescription medicine in most countries and is intended for adult men. It is not used in women who are or may become pregnant. Always start it under a clinician's guidance after a proper diagnosis, since not all hair loss is androgenetic.
What to expect and the timeline
Hair growth is slow, so patience is essential:
- First weeks: no visible change; some men notice a brief increase in shedding as follicles cycle.
- About 3 months: shedding often slows and loss begins to stabilize.
- 6-12 months: many men see modest regrowth or thicker hair, especially at the crown.
- 12-24 months: maximum benefit; results then need to be maintained.
Finasteride works mainly by slowing or halting further loss; regrowth, when it happens, is an added benefit rather than the rule. Benefits last only as long as you keep taking it.
What to watch for
Judge progress over months, not days, and consider standardized photos in the same lighting to track change objectively. Continued treatment is needed to keep results — gains are typically lost within about a year of stopping.
A small number of men report sexual side effects (such as reduced libido or erectile changes) or mood changes; for most who experience them these ease after stopping, and you should discuss any that bother you with your prescriber. Tell your doctor you take finasteride before a PSA prostate test, as it roughly halves PSA readings and the result needs adjusting. See a clinician promptly for sudden, patchy, or scarring hair loss, scalp pain, or rapid shedding, which may signal a different condition needing other treatment. Seek urgent help for any thoughts of self-harm, significant depression, breast lumps or discharge, or a severe allergic reaction. This article is educational and not a substitute for personal medical advice.
Try the free self-check →FAQ
How long does finasteride take to work?
Most men see hair loss begin to stabilize around 3 months, with visible improvement over 6-12 months and maximum benefit by 12-24 months. Because hair cycles are slow, give it at least a year before judging whether it is helping.
Can I take a lower dose or skip days to reduce side effects?
Some clinicians explore lower or less frequent dosing, but evidence for these regimens is limited and you should not change your dose on your own. Talk to your prescriber, who can weigh benefits against any side effects you are experiencing.
Explore more
⚠️ When to see a doctor — don’t self-treat
- Sudden patchy or circular bald spots
- Redness, scaling, pus, pain or itch (possible scarring alopecia — treat urgently)
- Broken hairs or rapid loss
- Loss with body-wide signs (weight loss, fatigue, cycle changes, acne, extra hair)
- Loss right after a new medication
- Any hair loss in a child