Topical minoxidil is one of only a handful of FDA-approved, proven treatments for androgenetic alopecia (AGA), and it is cleared for both men and women. Applied directly to the scalp as a 2% or 5% solution or foam, it does not block DHT the way anti-androgen drugs do. Instead it acts as a vasodilator that prolongs the anagen (growth) phase, encouraging follicles to produce thicker, longer-lasting hairs rather than removing the underlying cause.
Judging whether it works requires patience and consistency. Most people need 4 to 12 months of regular use before changes are visible, and because the effect is maintained only with ongoing use, stopping gradually reverses any gains. In the first weeks an initial increase in shedding — the so-called "dread shed" — is common; this typically reflects follicles resynchronizing their cycle and is usually not a reason to quit early.
The propylene glycol in solution formulations can cause contact dermatitis, itching, or flaking; switching to the foam, which omits it, usually resolves this. Minoxidil is a solid first-line option but not a cure-all, and evidence suggests better results when it is combined with microneedling or a 5-alpha-reductase inhibitor rather than used alone.
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FAQ
I started minoxidil and now I'm shedding more — did I do something wrong?
A temporary increase in shedding in the first 2–8 weeks (the "dread shed") is common and often reflects follicles resetting their growth cycle. It usually settles within a few weeks, so it's generally not a reason to stop. If the shedding is severe or lasts beyond two months, check in with a dermatologist.
Can women use minoxidil?
Yes — topical minoxidil is FDA-approved for female pattern hair loss as well. Women are often started at a lower concentration, so it's best to confirm the strength and routine with a clinician. If you are pregnant or breastfeeding, talk to your doctor before using it.
How long before I decide it isn't working?
The standard advice is to use it consistently for at least 4–12 months before judging the result. If there's truly no change in that window, ask a clinician to re-check the diagnosis and whether a combination approach would help. Keep in mind that stopping lets any gains fade gradually.
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⚠️ 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