Medications at a glance
| Medication | Type | Key risk | Approval status |
|---|---|---|---|
| Minoxidil | Topical/oral, non-hormonal | Irritation; unwanted hair growth (oral) | FDA-approved, OTC (topical) |
| Finasteride | Oral, hormonal (DHT blocker) | Sexual and mood-related, in a minority | FDA-approved for hair loss (men) |
| Dutasteride | Oral, hormonal (dual DHT blocker) | Like finasteride, clears more slowly | Off-label for hair loss in most countries |
Minoxidil
Originally an oral blood-pressure medication, minoxidil was found to grow hair as a side effect. Applied topically (solution or foam) or taken as a low-dose oral tablet, it widens blood vessels in the scalp and appears to extend the growth (anagen) phase of the hair cycle — though the exact mechanism still isn't fully understood. Unlike finasteride or dutasteride, it doesn't touch hormones at all.
- Doesn't affect hormones or DHT, so none of the sexual-side-effect risk that comes with finasteride or dutasteride
- Works for both men and women, and for general/diffuse thinning, not just classic pattern baldness
- Topical versions are available over the counter in most countries, no prescription needed
- Needs to be used indefinitely — stop, and any hair gained is typically shed within a few months as things return to where they'd have been anyway
- A temporary shedding phase in the first few weeks is common and discourages some people into quitting too early
- Topical forms can cause scalp irritation or dryness; oral minoxidil carries a real risk of unwanted facial or body hair growth (hypertrichosis)
Best for: Anyone — men or women — who wants a non-hormonal option, or who plans to pair it with finasteride or dutasteride for a stronger combined effect.
Finasteride
A daily tablet that blocks type II 5-alpha-reductase, the enzyme that converts testosterone into DHT (dihydrotestosterone) — the hormone mainly responsible for shrinking genetically susceptible follicles in male pattern baldness. It lowers DHT by roughly 70%, addressing a root cause of the miniaturization rather than just supporting the follicles that remain — genetics, not lifestyle habits, is what determines who actually needs it.
- Addresses the underlying hormonal driver of male pattern baldness, not just the symptom
- A single daily pill — no topical routine, no mess
- Long track record: FDA-approved for hair loss since 1997, with decades of studied use
- Sexual side effects — reduced libido, erectile dysfunction — are reported in a meaningful minority of users; most resolve after stopping, but a persistent version (sometimes called post-finasteride syndrome) is a real, if debated and comparatively rare, phenomenon worth knowing about rather than dismissing
- Mood-related side effects, including depression, have been reported by some users
- Not an option for women who are or may become pregnant, due to a risk of birth defects in a male fetus
Best for: Men comfortable with a prescription hormonal therapy who want to slow or stop progression at its hormonal root, often alongside minoxidil.
Dutasteride
A daily tablet that blocks both type I and type II 5-alpha-reductase — finasteride only blocks type II — resulting in a more complete DHT reduction, often cited around 90-95% versus finasteride's roughly 70%. It's the same class of drug taken a step further, not a fundamentally different approach.
- More potent DHT suppression than finasteride; some head-to-head studies suggest better hair-count outcomes at certain doses
- A useful next step for people who've tried finasteride without enough result
- Once-daily dosing, same simplicity as finasteride
- Not FDA-approved for hair loss in the US — it's approved there only for an enlarged prostate (BPH), so hair-loss use is off-label (it is specifically approved for hair loss in some countries, including South Korea and Japan)
- Same class of sexual and mood-related side effects as finasteride, potentially more pronounced given the stronger DHT suppression
- Much longer half-life than finasteride — around 5 weeks versus a few hours — so if side effects occur, they take far longer to clear from your system after stopping
Best for: People who haven't responded well enough to finasteride, working with a doctor comfortable prescribing off-label (outside South Korea and Japan) and who understand the much longer clearance time.
Combining medications — and what medication can't do
Minoxidil (non-hormonal) is commonly prescribed alongside finasteride or dutasteride (hormonal) since they work through different mechanisms — this combination has real supporting evidence and is standard practice in dermatology. What none of these medications can do is regrow hair in an area that's already completely bald, with no living follicles left — they work by protecting and supporting follicles that are miniaturized but still alive. That's the practical dividing line between medication and a hair transplant: medication maintains and slows loss in follicles you still have, a transplant moves follicles into areas that no longer have any.
This is informational, not medical advice
All three of these are real medications with real risks and individual variation — what's a mild, forgettable side effect for one person can be a significant one for another. Oral finasteride, oral dutasteride, and oral minoxidil all require a prescription; even over-the-counter topical minoxidil should be used according to its label. Don't start, stop, or combine any of these based on this page (or anything else online) — talk to a doctor or dermatologist who knows your history.
Thinking about a transplant instead, or alongside medication?
Use the free cost calculator to see a real price range for both lower-cost regions and US/UK/Western Europe, check the Norwood stage guide for typical graft counts, or see how the transplant techniques compare. For common questions about combining medication with surgery, see the FAQ. Getting your finasteride as a topical spray from a telehealth platform rather than the oral pill? Our topical finasteride safety guide covers what the FDA's 2025 alert actually found. Curious about the experimental side — like whether rapamycin can regrow hair — that guide covers what's real science versus what's still just longevity-forum hope. And if the emotional side of losing your hair feels heavier than you expected, our hair loss and mental health guide covers why that's a well-documented, common reaction — and what actually helps.