Minoxidil and finasteride together: what the combination evidence shows

Minoxidil and finasteride are the two options to weigh first for male pattern hair loss, and a common question is whether using both does more than using one. One sizeable trial set the pair against each of its parts: finasteride tablets, minoxidil on the scalp, and the two together. More men were rated as improved with both. ^[1]

This page goes through that trial and the smaller studies around it. It keeps apart three things that are easy to blur: a tablet with a scalp product, both medicines on the scalp, and both as tablets. It is written for adult men with gradual thinning at the hairline or the crown. Sudden, patchy or painful hair loss is a different situation: see the types of hair loss and when to get assessed first.

Why the two get paired

They are different kinds of medicine, used in different ways. Minoxidil for hair loss is a liquid or a foam put on the scalp twice a day, and the men's 5% products are sold over the counter in the US. Finasteride is a 1 mg tablet taken once a day, on prescription. ^{[2, 3, 4, 5]}

That sets them apart from the pairs that are really a choice. Minoxidil foam and solution are two forms of one medicine. Finasteride and dutasteride belong to the same group of medicines, and the UK finasteride label excludes taking it with another medicine of that group. Minoxidil and finasteride are neither of those things. ^[5]

Finasteride lowers the level of a hormone called DHT in the blood, by about 65% within a day of a 1 mg tablet according to the US label. That is a blood measurement, not a measure of regrowth. We do not explain here how minoxidil acts on the hair follicle. This page reports what trials, labels and regulators' notices say about results, use and side effects. ^[4]

Three ways of combining them

"Minoxidil and finasteride together" can mean three different things, and the evidence is not the same for each. The table is the map for the rest of this page. Other pairings, such as microneedling with minoxidil, are on hair loss routines.

The main trial: tablets, minoxidil on the scalp, or both

The trial was published in 2015. It randomly assigned 450 Chinese men with male pattern hair loss to one of three groups for 12 months: finasteride tablets, 5% minoxidil on the scalp, or both. The men came back every three months to be assessed. At the end, 428 of them were assessed, 22 fewer than had started. The summary reports that the three groups were similar at the start in age and in how long and how severely they had been losing hair. ^[1]

More men improved with both medicines than with either one alone. That is the finding this pairing rests on. What it means depends on a word the summary does not explain.

What "improved" meant

Each figure is a share of men. Of the 152 men assessed after using both, 94.1% were rated as improved. The published summary does not say what counted as improved. It gives no scale and no definition. ^[1]

The gap between the two medicines used alone, 80.5% against 59%, needs the same care. We do not read it as a ranking. It comes from one trial, read from its summary, and our review does not establish which of the two works better.

The limits of this trial

We could not obtain the full paper, so these are gaps in what we could read. They are not necessarily gaps in the trial itself.

Two more limits come from what was tested. Our review ties this evidence to minoxidil solution: foam was not a verified part of this trial or of the smaller study below. And doing better than either medicine alone does not show that the two multiply each other's effect, which the trial was not built to test. It is also one trial, in Chinese men, over 12 months.

Minoxidil added for men already taking finasteride

A much smaller study came at the pair from the other side: what does minoxidil add for a man who is already on finasteride? Twenty-two men aged 19 to 40, all taking finasteride 1 mg a day, were randomly given a 5% minoxidil lotion or the same lotion without minoxidil. ^[17]

The study measured changes in the hair cycle, the phases a hair goes through as it grows and is shed, and not simply the number of hairs. Those measures improved during the months on the minoxidil lotion, which supports a limited extra effect on top of finasteride. When the lotion was stopped, staying on finasteride did not keep all of that change. ^[17]

It is a small experiment, and we took no side-effect counts from it. The work was carried out and paid for by an organisation its author is affiliated with. ^[17]

Both medicines on the scalp

Putting finasteride on the scalp together with minoxidil is a different treatment from taking the tablet, and it has its own trials. Most are small, they tested different products, and their results do not agree. For the spray used on its own, see finasteride spray and how it compares with the tablet.

Two separate products

In a trial in Rome, 42 men with an average age of 24 were put into three groups for six months. Nineteen used a 5% minoxidil lotion in the morning and a finasteride spray in the evening, 12 used the spray alone, and 11 used the minoxidil lotion alone, twice a day. All 42 completed it. ^[6]

The men using both started with far less hair than the minoxidil group and gained more, but the difference between those two gains was not statistically significant. Photographs told a different story. On a scale from −3 to +3, the average rating was 2.0 with both products, 1.3 with minoxidil alone and 0.6 with the spray alone, and the advantage over minoxidil was significant. ^[6]

Three things limit what this shows. The men knew what they were using, although the person rating the photographs did not. The groups were unequal at the start. And minoxidil went on once a day in the group using both and twice a day in the group using it alone. The authors declare no conflicts of interest, and we found no statement of who funded the trial. ^[6]

One mixed solution

A trial in New Delhi tested a single solution containing both medicines. Sixty men aged 18 to 40 were randomly put into three groups of 20: finasteride 0.25% with minoxidil 5%, minoxidil 5% alone, or finasteride 0.25% alone. Each man used 1 mL twice a day for 24 weeks, and nobody dropped out. ^[7]

The table shows how many more hairs per cm² the mixed solution gained than minoxidil alone after 24 weeks. These are simple differences between the averages printed for each group, with no margin of error given. ^[7] The page on minoxidil and a receding hairline looks at the front and temple counts from the same trial.

The difference was statistically significant on two of the six measures, so the conclusion in the paper's summary is broader than its own tables. The trial was open: the men knew what they were using, hairs were counted by hand, and the photographs were rated by someone who knew the groups. Funding was declared as none. ^[7]

Three more mixes

Three other trials mixed finasteride into a minoxidil solution and compared it with the same minoxidil alone. We read all three from their summaries. ^{[8, 9, 10]}

One more report, of 164 men over 12 weeks, describes its groups and totals inconsistently, so we take no result from it. ^[11]

Both medicines as tablets

Minoxidil also comes as a tablet. In the US and UK it is authorised for high blood pressure, so taking it for hair loss is an off-label use that needs a prescriber. ^{[15, 16]} Taking it together with finasteride tablets has been described. It has not been tested against either medicine alone in anything we could read.

A UK service looked back at its own records of men who had taken a single tablet combining finasteride 1 mg and minoxidil 2.5 mg once a day for about 12 months. Of 540 men who qualified, 38 were left out because their photographs were too poor to rate, which left 502. ^[12]

Without a group taking one medicine alone, the report cannot show what the pair adds. Men who stopped early are not in it. Side effects were not recorded in a structured way, so it says nothing reliable about safety. ^[12]

A 2025 report did compare minoxidil tablets alone with minoxidil tablets plus finasteride or dutasteride. Only its bibliographic record was available to us, with no summary, so we take no result from it. ^[18] For the tablets on their own, see minoxidil tablets for hair loss.

What labels and regulators say about using both

Research and product labels are two kinds of information. A trial shows what happened when a group of men used something in a set way. A label says how one product is to be used, in one country. For this pair the two do not line up neatly.

So the research and the UK tablet label both stand: a trial favoured the pair, and the label says no data are available on it. A trial of other products does not change what a label says. ^{[1, 5]}

Mixes made to order

The FDA's alert describes finasteride from made-to-order scalp products being absorbed into the body, reactions on the scalp, and transfer to other people through contact. It mentions 32 reports received between 2019 and 2024, many of them with symptoms that continued after stopping. Reports like these show that something can happen. They do not show how often. ^[13]

The largest set of figures we found on such mixes comes from a company that prescribes them. A US telehealth company reported on 638,629 men prescribed its scalp products: two sprays and a serum, all containing finasteride 0.3% with minoxidil at 6% or 7%, one of them with further ingredients. About a quarter, 151,352, answered a follow-up question: 121,615 said they were satisfied and 4,034 reported side effects or other negative reactions. The company funded the report, the answers are the patients' own, and there was no comparison group. It cannot show how much hair those men gained, or that a scalp mix is safer than the tablet. ^[20]

What is not established

Not established does not mean that no study exists. Several of the reports above were available to us only as summaries, and one only as a bibliographic record. Where that limits a statement on this page, we say so.

Side effects to keep in view

Using both means carrying the risks of both, and no study we reviewed gives a usable figure for men on the pair. The main trial's summary reports adverse reactions in 1.8% of the finasteride group and 6.1% of the minoxidil group. It gives no figure for the men who used both, and it does not say how reactions were recorded. ^[1]

These are counts from particular trials and warnings from labels and regulators, not anyone's personal odds. ^{[4, 22, 23, 24, 3, 25]}

The scalp trials add little. In the trial of 60 men, 15 reported scalp symptoms or headache in the first 12 weeks, all in the two groups using minoxidil. In the 12-week trial of 40 men, the summary mentions lower sex drive in the group on minoxidil alone, and mild erection problems, chest pain and one case of contact dermatitis in the group on the mix. Trials this small cannot show that a scalp mix is safer than the tablet, or that it is not. ^{[7, 10]}

What using both involves, as the labels state it

No label we checked describes the two medicines as one routine. Using both means following two separate sets of instructions: the tablet's, and those of one minoxidil product. These are the men's labels we checked at the end of September 2026. ^{[4, 5, 2, 14, 3, 25]}

What is missing matters as much. The main trial's summary does not give the amount of minoxidil its men used or how often, so the labels are the only reference. No source we reviewed establishes which part to use first in the day, or a gap to leave between the tablet and the scalp product.

A third product is not part of the pair. A second form of minoxidil duplicates the first, and no study we reviewed tests the finasteride tablet together with a finasteride spray. See how to use minoxidil, foam and solution compared and the tablet's label in the finasteride profile.

How long to judge it

Think in months, and let each part keep its own clock. The minoxidil labels expect first signs after about two months, and each sets a point to stop and get advice if nothing has changed: 16 weeks for the UK foam, 4 months for the US products, one year for the UK solution. The US finasteride label says a benefit generally takes three months or more. In the main trial the men were assessed every three months, and the result it reports is the one at 12 months. None of these dates applies to a side effect. ^{[2, 14, 3, 25, 4, 1]}

If one part is stopped

The gain from each medicine depends on continuing it. The US finasteride label says the effect reverses within 12 months of stopping, and the UK minoxidil solution label reports regrowth fading within three to four months. In the small study of men on finasteride, the tablet did not hold on to everything the lotion had added. None of these sources gives a schedule for taking breaks or for dropping one part. ^{[4, 2, 17]}

What "before and after" can tell you

A before-and-after picture shows one person at two moments. The main trial reported something different: the share of a group rated as improved, with no statement of how much change was enough to count. So the 94.1% is not a picture of what one head of hair will look like after a year. For your own record, photos taken the same way each time and a note of when each part was started give you something to compare at a review point. That is an organising suggestion of ours, not something tested in a trial.

Where to go next

If you have not settled on a first option, the comparison comes before the combination. How we weigh evidence, and why we stop where the sources stop, is on the methodology page. The hair questionnaire points to the relevant page without diagnosing or prescribing anything.