Minoxidil vs Finasteride: Twice a Day on the Scalp, or One Pill a Day

The biggest difference is where each medicine works.

Minoxidil goes on the scalp. Counsel Health says its “effects are local to the scalp.” Finasteride is a pill that blocks a hormone called DHT, and Counsel calls it “a systemic medication affecting the whole body.” Counsel says minoxidil is best for early thinning. It says finasteride is more often used for more advanced loss.

• Pick minoxidil if your thinning is early and you want a medicine that stays on the scalp.
• Pick finasteride if your loss is further along and you accept a medicine that acts on the whole body.
• Ask about both if you want what a 2015 study cited by Numan found gave the best results (see below).

This page sums up public health sources and company explainers. It is not medical advice or a promise of results.

Minoxidil widens scalp blood vessels; finasteride blocks DHT

Keeps and Numan both call minoxidil a vasodilator, which means a drug that widens blood vessels. Counsel Health describes it as “widening blood vessels to promote increased flow to your hair follicles.”

Finasteride works on a hormone instead. According to Counsel Health, it blocks production of DHT (dihydrotestosterone), “a hormone closely associated with male pattern hair loss.” The sources disagree on how much DHT drops. Counsel says production falls “by over 90%.” Numan says the scalp ends up with “around 60% less” DHT. One figure is about how much DHT is made, the other about how much is left in the scalp, so they are not the same measurement.

The obvious objection to finasteride is that it does not stay in the scalp. Counsel says it acts on the whole body, while minoxidil’s effects stay local. If that rules finasteride out for you, minoxidil is the option that stays on the scalp. Keeps also lists topical finasteride as a compounded gel, meaning a pharmacy makes it up rather than selling a standard product. Ask a prescriber what that form would change.

Minoxidil is FDA approved for men and women; oral minoxidil is off-label

Counsel Health says minoxidil is approved by the FDA (the US Food and Drug Administration) for both men and women. Finasteride is approved only for men. For a man, both are approved options.

The bigger split is the form. Counsel says minoxidil goes on the scalp and finasteride is taken by mouth. Counsel also notes that oral minoxidil is prescribed for hair loss off-label. That means a doctor prescribes it for a use the FDA has not approved. It is not currently approved for hair loss.

How often you take them differs too. Numan gives minoxidil as twice daily and finasteride as a 1 mg tablet once daily. Keeps also says topical minoxidil goes on twice a day.

The AAD gives minoxidil 6-12 months; Counsel gives finasteride at least six

The American Academy of Dermatology (AAD), the professional body for US skin doctors, says minoxidil results usually take that long to show. Counsel Health is much faster: it says minoxidil regrowth shows at 8 weeks and peaks at four months. The AAD is the medical source here, so its longer window is the one to plan around.

For finasteride, Counsel says it “usually takes at least six months to make a noticeable effect.” It adds that a reversal in hair count generally comes after a year of use.

Either way, agree on a review date with your prescriber before you start. That way a few weeks of checking the mirror doesn’t make the call.

Stop minoxidil and the benefit goes

The AAD is plain about it: minoxidil has to be used every day, and if you stop applying it, you lose its benefits. On the twice-daily schedule Numan and Keeps give, that means two applications a day with no end date. If that won’t last, finasteride’s one tablet a day is the simpler routine, but it acts on the whole body.

For finasteride, the pages here do not say what stopping means. Put that question to your prescriber.

One table, four sources, two places they disagree

No single source puts these answers side by side. Two rows show the sources contradicting each other.

Question	Minoxidil	Finasteride
FDA approved for	Men and women (Counsel)	Men only (Counsel)
Form	On the scalp; oral use is off-label (Counsel)	Pill by mouth (Counsel); compounded gel offered (Keeps)
How often	Twice daily (Numan, Keeps)	1 mg tablet once daily (Numan)
How it works	Widens blood vessels to raise blood flow to follicles (Counsel)	Blocks DHT: production cut “by over 90%” (Counsel) vs “around 60% less” in the scalp (Numan)
Where it acts	Local to the scalp (Counsel)	Whole body (Counsel)
Time to judge	6-12 months (AAD) vs regrowth at 8 weeks, peak at 4 months (Counsel)	At least 6 months; hair count reverses after a year of use (Counsel)
If you stop	Benefits lost (AAD)	Ask your prescriber
Best fit	Early thinning (Counsel)	More advanced loss (Counsel)

Read the disagreements first. Counsel’s first sign of regrowth for minoxidil (8 weeks) and its peak (four months) both come before the AAD’s window even starts. On DHT, Counsel’s figure is 30 points above Numan’s (90 − 60 = 30), and the two figures measure different things: how much DHT is made versus how much is left in the scalp.

Using both: Numan cites a 2015 study where the pair did best

Numan says a 2015 study found the two used together had the best results. They work in different ways: one on blood flow in the scalp, the other on DHT. But this is a company’s one-line summary of a study, not the study itself, so the evidence as given here is weak. Ask your prescriber whether it applies to you.

Where each falls short, and which to ask about first

Minoxidil has to go on twice a day (Numan) and its benefit goes when you stop (AAD). Numan also notes it does not actively halt the loss itself. Finasteride acts on the whole body, not just the scalp (Counsel Health). But each makes up for a weak spot in the other: minoxidil stays on the scalp, and finasteride works on DHT, the hormone Counsel links to the male pattern.

So the choice follows Counsel’s own split. If your thinning is early, start the conversation with minoxidil. If your loss is more advanced, finasteride is the one Counsel describes for that stage, as long as you accept a whole-body medicine.

• Skip finasteride if a medicine that acts on the whole body is a deal-breaker. Ask about minoxidil, whose effects stay on the scalp.
• Skip minoxidil if you won’t keep up twice-daily applications for good. Ask about finasteride, one tablet a day.

About half of men have some hair loss by 50

MedlinePlus Genetics says more than 50 percent of men over age 50 have some degree of hair loss, which backs Numan’s “up to 50%” by age 50. Keeps says two out of three men will have some form of male pattern baldness by 35. That uses a different age and broader wording, so it is not a competing estimate of the same thing.

How we evaluated

This comparison sets two public health sources, the AAD and MedlinePlus, beside company explainers from Counsel Health, Numan and Keeps. It covers six questions: approval, form, schedule, how each works, time to judge and what stopping means. Where the sources disagree, both figures appear with their source.

Seven questions to bring to a doctor or dermatologist

1. Does my hair loss follow the male pattern, or could it be another type?
2. Is my thinning early or more advanced, and which medicine fits that stage?
3. Am I comfortable with a medicine that acts on the whole body?
4. What happens if I stop finasteride?
5. Would off-label oral minoxidil or compounded finasteride gel make sense for me, and why?
6. What side effects should I watch for with each?
7. Should I use both, and when will we review results?

FAQ

Can I use both? Numan cites a 2015 study in which the two used together had the best results. Whether that suits you is your prescriber’s call.

Which works faster? On Counsel Health’s figures, minoxidil: first regrowth at 8 weeks, against at least six months for finasteride. The AAD’s timeline for minoxidil is much longer, so don’t count on the early mark.

Is oral minoxidil approved for hair loss? Not currently. Counsel Health says it is prescribed off-label.

When to see a dermatologist

MedlinePlus Genetics says male pattern loss starts above both temples and can form an M-shaped hairline. See a dermatologist if your loss doesn’t follow that pattern or you can’t tell what type it is. See one too if you have used either medicine for the time the AAD or Counsel gives and still can’t tell whether it is helping. MedlinePlus has an overview of the other kinds of hair loss to read before you go.