Minoxidil 5%: What It Is and Who It's Actually For

Most people who try minoxidil quit before it has had a chance to work. Not because it failed, but because nobody told them the first two months look like nothing is happening, and the third month can look worse.

This is what 5% minoxidil actually does, who it works for, how to apply it, and what it costs per month once you stop reading the price on the bottle.

On this page:

• What minoxidil 5% actually is
• 5% or 2%: which strength do you need?
• How to apply it properly
• How long it takes: a realistic timeline
• Lotion or foam?
• What it costs per month
• Do expensive brands work better?
• Will a dandruff shampoo grow hair?
• When minoxidil is the wrong answer
• Frequently asked questions

What minoxidil 5% actually is

Minoxidil started life as a blood pressure tablet. Patients taking it grew hair in places they had not asked for, and the topical version followed. It is now the only over-the-counter treatment with solid clinical evidence behind it for androgenetic alopecia, better known as male and female pattern hair loss.

It works on the hair growth cycle. Follicles spend time in an active growth phase (anagen) and a resting phase (telogen). In pattern hair loss the growth phase shortens with each cycle and the follicle shrinks, producing finer, shorter hairs until it produces nothing. DermNet describes how minoxidil lengthens that growth phase and pushes resting follicles back into it. Improved blood flow to the follicle plays a part too.

What it does not do is address the hormonal cause. It manages the symptom for as long as you use it. If the loss you are seeing does not look like the classic pattern, our page on whether it works on a receding hairline covers the one area where results are genuinely weaker, and our hair loss myths and facts page deals with the causes people wrongly blame.

5% or 2%: which strength do you need?

5% twice daily is the standard for men, and it outperformed 2% in clinical comparisons. The Regaine for Men Extra Strength Scalp Solution 5% leaflet sets out that dosing: 1ml, twice a day. Whether the second daily application is negotiable is a question in itself, and our page on once or twice daily works through what the evidence supports.

For women, 2% twice daily is the long-established option. A 5% once-daily foam is also used by women in some markets, and the Regaine for Women Once a Day Scalp Foam 5% leaflet covers that regimen. The difference matters: higher strength raises the chance of unwanted facial hair growth. Our guide to 2% versus 5% for women walks through that decision properly.

Higher is not better. Going above the labelled strength increases side effects without a matching increase in regrowth.

How to apply it properly

Applied correctly, minoxidil is a two-minute routine. Applied sloppily, it is the most common reason the treatment underdelivers, because the drug ends up on hair rather than on skin.

• Dose by the label. For the solution that is 1ml twice a day on the thinning areas. A larger thinning area does not earn a larger dose.
• Dry scalp, washed hands afterwards. Part the hair so the liquid reaches skin, massage in lightly, then wash your hands.
• Let it dry before bed. Wet minoxidil on a pillowcase migrates to places you did not intend, your face included.
• Missed a dose? Skip it and carry on, since doubling up does nothing useful. Our page on missing a dose covers how much slippage actually costs you.

The mechanics differ by format, and both are worth getting right from the first bottle. Our dropper and applicator guide covers accurate dosing with a solution, our page on applying minoxidil foam covers the half-capful method, and our first 30 days checklist is the one to read before you open the pack. If you style your hair, our page on using hair products alongside minoxidil covers the order of operations.

How long it takes: a realistic timeline

The first weeks look worse before anything looks better, which is why the timeline matters more than any other single fact on this page.

Period	What you should expect
Weeks 1 to 2	Nothing visible. You are establishing the habit, no more.
Weeks 2 to 8	Possible shedding. Old hairs are pushed out as follicles restart. Unsettling, normal, temporary.
Months 3 to 4	Fine new hairs at the hairline and crown. Easier to feel than to photograph.
Months 6 to 12	The honest assessment point. Thickening of existing hair is usually more noticeable than new coverage.
Stopping	Regrown hair is lost over roughly three to six months.

Those figures line up with the published guidance. DermNet puts visible growth at around four months of consistent use and notes that the scalp returns to its pretreatment appearance three to four months after stopping.

Our page on how long minoxidil takes to work expands that table month by month. If you are already past the assessment point with nothing to show, our page on what to check after six months works through the causes in order, and our page on what happens when you stop covers the other end of the commitment.

Lotion or foam?

Same drug, different carrier. The choice comes down to your scalp and your routine.

Lotion, also sold as solution, contains propylene glycol, which helps the minoxidil absorb. It is applied with a dropper, which gives precise placement on a thinning crown, and it costs less per month. Propylene glycol is also the most common cause of scalp irritation with minoxidil.

Foam contains no propylene glycol. It dries in minutes and is the sensible switch if lotion has left your scalp itching or flaking. It costs more per millilitre, and the Regaine Extra Strength Scalp Foam 5% leaflet covers how it is applied. Our foam versus lotion guide digs into the trade-off in full.

Start with lotion unless you already know your scalp is sensitive. If it irritates, move to foam rather than stopping treatment altogether.

What it costs per month

Minoxidil only works while you use it, so the number that matters is cost per month, not the price on the bottle. Buying longer supplies changes that figure substantially:

Kirkland Signature 5% lotion	Price	Per month
1 month (60ml)	EUR 24.99	EUR 24.99
3 months (3×60ml)	EUR 64.99	EUR 21.66
6 months (6×60ml)	EUR 89.99	EUR 15.00
12 months (12×60ml)	EUR 149.99	EUR 12.50

Kirkland Signature contains the same 5% minoxidil as the branded alternatives. The inactive ingredients and the price differ; the active drug does not. At twelve months it works out at roughly EUR 0.21 per millilitre.

That said, the twelve-month pack is a real commitment. If you are not sure you will stick with it, a shorter supply costs more per month but wastes less if you stop.

Do expensive brands work better?

No. A 5% minoxidil solution contains 5% minoxidil whoever made it. The inactive ingredients differ slightly between manufacturers, which occasionally matters for comfort, and most of the price difference is advertising spend rather than formulation.

The gap is not small. A branded 5% foam such as Rogaine's three-month foam at EUR 79.99, currently on pre-order with delivery expected mid-September, works out at EUR 26.66 a month, against EUR 12.50 for the twelve-month Kirkland lotion. Over a year that is roughly EUR 170 for the same molecule. Our Regaine versus Kirkland comparison sets out exactly what does and does not differ.

There are two honest reasons to pay the premium, and neither is efficacy: a foam carrier if propylene glycol irritates your scalp, and a smaller pack if you are not yet sure you will keep going.

Will a dandruff shampoo grow hair?

Ketoconazole treats dandruff and seborrhoeic dermatitis. The evidence for it growing hair in its own right is thin, and forum enthusiasm has hardened it into something the science does not support.

It does have a real place alongside minoxidil, which is keeping the scalp comfortable enough that you stay on the treatment that does have evidence behind it. That is a smaller claim and a true one. Treating a scalp problem while leaving the hair loss untreated is how people arrive at month six convinced nothing works.

When minoxidil is the wrong answer

Minoxidil treats pattern hair loss, and DermNet sets out what that pattern looks like. It is not the right tool for everything that causes hair to fall out, and using it on the wrong problem delays a proper diagnosis.

• Smooth, round bald patches appearing suddenly can indicate alopecia areata, a different condition needing different treatment.
• Shedding that follows illness, surgery, childbirth or crash dieting is usually telogen effluvium, which tends to resolve on its own once the trigger has passed.
• Scalp pain, scaling, burning or visible scarring should be looked at before you treat it yourself. If flaking is the main complaint, a medicated shampoo is often the more relevant starting point.
• Hair loss alongside fatigue, weight change or brittle nails warrants a blood test rather than a bottle of minoxidil. The NHS sets out when hair loss needs a doctor.

Side effects are the other reason to pause. Most are local and manageable, but chest pain, a rapid or irregular heartbeat, dizziness or sudden swelling mean stopping and getting advice the same day. Our guide to common, rare and serious side effects sets out which is which.

Frequently asked questions

Is Kirkland minoxidil the same as Regaine?

The active drug is identical: 5% minoxidil. The inactive ingredients, packaging and price differ, and Kirkland typically costs considerably less per month. We compared them in detail in our Regaine versus Kirkland comparison.

Do I really have to apply it twice a day?

For 5% solution, yes. That is the dosing the clinical evidence is based on, and once-daily use is likely to give a weaker result. If twice daily does not fit your routine, a once-daily 5% foam may suit you better. Follow the label on your pack.

What happens if I stop?

Hair gained is gradually lost over three to six months, and your hair returns to roughly where it would have been without treatment. Minoxidil maintains a result rather than curing the cause, so it is a routine rather than a course.

Why is my hair shedding more since I started?

Shedding between weeks two and eight is expected. Follicles restarting their growth phase push out the old hair first, and it settles on its own. If heavy shedding continues past three months of consistent use, speak to a doctor rather than guessing.

Can I use minoxidil after a hair transplant?

It is often used to support the surrounding hair, but the timing depends on how the grafts are healing. That makes it a conversation for the clinic that did the procedure rather than a decision to take on your own.