Medication questions Minoxidil
How long does minoxidil take to work?
Short answer
Expect months, not weeks. UK product information for Regaine says it may take twice-daily use for 2 months or more (men's 5% solution) or 4 months or more (women's 2% solution) before growth shows. The British Association of Dermatologists advises using minoxidil for at least 6 months, and possibly 12, before judging. Some people shed more in the first few weeks.
Key facts
- Regaine for Men 5% solution: 2 months or more before growth may show; stop if no improvement after one year.
- Regaine for Women Once a Day 5% foam: 12 to 24 weeks; stop if no improvement after 24 weeks.
- The British Association of Dermatologists advises at least 6 months, possibly 12, before judging.
- Temporary extra shedding generally starts 2 to 6 weeks in and settles within a couple of weeks.
What the UK product information says
Each licensed minoxidil product in the UK has a summary of product characteristics (an SmPC, the official prescribing document). They give slightly different timescales because each product was tested in its own trials:
Regaine for Men Extra Strength 5% solution: it "may take twice daily applications for 2 months or more before evidence of hair growth can be expected". Users should stop if there is no improvement after one year.
Regaine for Men Extra Strength 5% foam: it may take twice-daily applications for 8 weeks or more. The SmPC says to stop if there is no improvement after 16 weeks.
Regaine for Women Regular Strength 2% solution: four months or more of twice-daily use, and stop if there is no improvement after one year.
Regaine for Women Once a Day 5% foam: 12 to 24 weeks of once-daily use, and stop if there is no improvement after 24 weeks.
The British Association of Dermatologists (BAD) takes a longer view in its patient leaflet: minoxidil "needs to be used for at least 6 months and possibly up to 12 months before any benefit may be noted".
Why hair takes so long to show a change
Each hair follicle cycles through a growing phase (anagen), a short transition and a resting phase (telogen), after which the old hair falls out. Our hair growth cycle entry explains the phases in more detail.
The Regaine SmPC explains that minoxidil works partly by shifting hairs from the resting telogen phase to the growing anagen phase. A new hair then has to grow long enough to be seen and to add to the overall look of your hair, which takes months. The Regaine leaflet also notes that early regrowth "may be soft and downy at the start" before it becomes like your normal hair.
Why you might shed before anything improves
Some people notice more hairs falling out soon after starting. The Regaine SmPC says this "generally occurs two to six weeks after beginning treatment and subsides within a couple of weeks", because old resting hairs are being pushed out as new ones start to grow.
It can feel alarming, but it is a recognised effect rather than a sign that the medicine is damaging your hair. Our guide to minoxidil shedding covers how long it typically lasts and when to speak to a doctor.
Oral minoxidil and compounded topicals
Low-dose oral minoxidil is licensed in the UK for severe high blood pressure, not hair loss, so its use for hair loss is off-label. There is no licensed hair loss timescale for it. Your doctor sets the dose after assessing you and reviews how you are getting on.
The compounded topical minoxidil that WMG Meds can prescribe is an unlicensed special, so it has no SmPC of its own. In our process the first follow-up review happens at around 3 months and the plan is reviewed against your response at around 6 months. The doctor will explain what is realistic for you, because response varies from person to person.
What "working" can look like
Minoxidil does not work for everyone, and the BAD describes it as something that "may help to slow down the progression of hair loss". For many people, slowing or stopping further thinning is a worthwhile result, even if they see little new hair.
The NHS notes that hair loss treatments "only work for as long as they're used". The Regaine leaflet says that if you stop, regrown hair "may disappear after 3-4 months". Our guide on how to tell if hair loss treatment is working explains how to track progress fairly. If you would like a doctor to look at your situation, the free online assessment is a good place to start.
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Start your free assessment →Related questions
Can I make minoxidil work faster by using more?
No. The Regaine for Men leaflet says not to use more than twice a day and not to exceed 2 ml a day. Using more than directed makes it more likely that minoxidil reaches the bloodstream, which is what causes side effects such as a fast heartbeat, dizziness and swollen hands or feet.
Does the early shedding mean it is working?
Not necessarily. The SmPC explains the shed as resting hairs being replaced by new growing ones, which fits with the medicine taking effect, but it does not guarantee a visible result. Judge progress over months using consistent photos.
What if I see no change after 6 months?
A stable picture can itself be a good result, because the aim is often to slow further loss. Some licensed products say to stop if there is no improvement after a set time, so review it with your prescriber or pharmacist rather than stopping or changing the dose on your own.
Do I have to keep using minoxidil for good?
Any benefit lasts only while you use it. The Regaine leaflet says regrown hair may disappear 3 to 4 months after stopping, and the hair loss process will continue. Choosing not to use treatment is also a valid decision.
Why is the first new hair fine and soft?
The Regaine leaflet says new growth may be soft and downy at first but should eventually become the same as normal hair.
Sources
- Regaine for Men Extra Strength Scalp Solution 5%: SmPC (eMC)
- Regaine for Women Once a Day Scalp Foam 5%: SmPC (eMC)
- Regaine for Men Extra Strength Scalp Solution 5%: patient leaflet (eMC)
- British Association of Dermatologists: male pattern hair loss patient leaflet
- NHS: hair loss
Facts checked against these sources on 4 October 2026. This page is general information, not personal medical advice. Read our editorial policy.