The dandruff shampoo dermatologists keep recommending for more than dandruff. What it does, what the research shows, how to use it, and what 11 skincare experts said about it on camera.
Your scalp is flaking, your eyebrows are too, and somebody online swears the same dandruff shampoo will clear your acne and thicken your hair. Can one shampoo really do all that? Is the drugstore 1% any good, or do you need 2%? How long do you leave it on? And is it the same thing as the ketoconazole tablets with the liver warnings?
The short answer is reassuring. For dandruff and the itchy, flaky rash called seborrhoeic dermatitis, the experts and the research agree. It works. For fungal acne it is a sensible option once the diagnosis is confirmed, and for hair loss it is a small extra, not the main event.
Ketoconazole's Guru Score is 82%, and most of the warmth is about the scalp: dandruff, seborrhoeic dermatitis and, more and more, hair loss. The reservations are practical rather than medical. It can leave long hair dry, and as a rinse-off shampoo its effect on hair loss is modest. Below, what the experts said sits next to what the studies found, so you can see where the two line up and where the evidence runs thin.
Ketoconazole is an antifungal medicine used on the skin and scalp to treat dandruff, seborrhoeic dermatitis and fungal skin infections. The experts we track recommend it, mostly for the scalp. The research backs it best for dandruff and seborrhoeic dermatitis, where trials found the 2% shampoo cleared flaking better than placebo and helped stop it coming back [1, 2]. The evidence for hair loss is small and early [14, 17]. The tablets are a different medicine, restricted because of liver damage [18, 20].
| Question | What we found |
|---|---|
| What is it used for? | Dandruff, seborrhoeic dermatitis and fungal skin infections such as pityriasis versicolor, athlete's foot and jock itch [4]. |
| Do skincare experts recommend it? | Yes, especially for dandruff and flaky scalps. Their doubts are practical, like dry hair. |
| Do I need a prescription? | In the US, the 1% shampoo is over the counter and the 2% shampoo is prescription only [7, 8]. In the UK you can buy most ketoconazole shampoos and creams in pharmacies, but pityriasis versicolor needs a prescription [4]. |
| How long do I leave it on? | UK labels say 3 to 5 minutes before rinsing [5, 9]. The US prescription shampoo says 5 minutes [8]. |
| Does it help hair loss? | Possibly, as an add-on. The studies are small and mostly in men, and reviewers want proper trials [14, 17]. |
| Is the pill the same thing? | No. Oral ketoconazole is restricted because it can cause serious liver damage. The shampoos and creams have not been linked to that [18, 20]. |
Ketoconazole is an antifungal medicine from the azole family. On the skin it comes as a shampoo or a cream, and it targets yeasts and fungi that live on the skin or cause infections [4].
Its best known target is Malassezia, a yeast that lives on everyone's skin. In some people it is linked to dandruff and seborrhoeic dermatitis, the itchy, flaky, often greasy rash on the scalp, eyebrows, sides of the nose and beard area [3, 9]. Bringing the yeast down calms the flaking and itch. The same yeast is behind pityriasis versicolor, the pale or brown patches that tend to show up after time in the sun, and Malassezia folliculitis, the itchy bumps often called fungal acne [9, 11].
The creams also treat common fungal skin infections such as athlete's foot, jock itch and sweat rash [4].
Here is what each of them said on camera, with a link to the moment they said it.
These are solid evidence-based ingredients for reducing the burden of malassezia. Apply the shampoo [...] to the affected area, lather it there, and [...] let it sit on the skin for a few minutesWatch ▸
[Ketoconazole] is probably the gold standard for that and I've noticed in my rosacea patients when I include [ketoconazole] in it actually helps their rosacea a lot as well with their flareupsWatch ▸
I think this is fungal acne. I think you need to be using ketoconazole on the face. Forget trio blemish for the face. Put ketoconazole shampoo on the face. I think you're going to see a big improvement with that.Watch ▸
There are a lot of expensive shampoos out there for hair loss but truthfully none of them has showed consistent results and independent studies the way that topical [ketoconazole] shampoos have. If there was one shampoo I was going to buy for hair loss that I would be pretty confident would work, it would be a [ketoconazole] shampoo.Watch ▸
You can rotate that with a Ketoconazole 1% shampoo which is a little more drying but if you kind of just leave it on your scalp and rinse off after a few minutes and rotate between that, make sure you're conditioning your hair, that can be a great way to manage majority of the mild dandruff.Watch ▸
If you're a man and you've got short hair this might work much better for you. For a woman, for me, to get this in my scalp and leave it there for three to five minutes, it literally turns my hair into straw.Watch ▸
The experts largely recommend it, so the caveats are where the useful detail sits.
The strongest evidence is for seborrhoeic dermatitis and dandruff. A Cochrane review of 51 trials found ketoconazole 2% lowered the risk of the rash failing to clear by 31% compared with placebo at four weeks, and worked about as well as steroid treatments with fewer side effects [1]. The reviewers rated much of the evidence low quality and noted that very few trials ran longer than four weeks [1].
It also helps keep flaking away. In a trial of 575 people with scalp seborrhoeic dermatitis and dandruff, 88% had an excellent response to the 2% shampoo used twice a week. Among those who then kept going with it once a week for six months, 19% relapsed, against 47% on a plain shampoo [2]. Seborrhoeic dermatitis tends to be long term in adults, so ongoing maintenance is often needed [3].
For hair loss, the evidence is thin. A 2020 systematic review found five small human studies with 318 people in total. They reported thicker hair shafts and some visible improvement, and the authors called ketoconazole a promising add-on while asking for randomised trials [14]. One early study found the 2% shampoo improved hair density about as much as 2% minoxidil, but it was small, and its authors said the results needed a larger controlled study [15]. In 150 men with dandruff and shedding, a 1% shampoo cut shedding over six months but did not change hair density [16]. A review of topical anti-androgen treatments called the evidence preliminary and pointed out that women have been left out of most studies [17].
For fungal acne, dermatology references say topical treatments including ketoconazole work in most cases, with antifungal tablets kept for stubborn ones [11]. The catch is diagnosis: it looks a lot like ordinary acne, and specialists warn about people treating themselves with antifungals without a confirmed diagnosis [12, 13].
The experts in this guide are talking about ketoconazole you put on your skin or scalp. Ketoconazole tablets are a different matter. In July 2013 the US Food and Drug Administration restricted the tablets because they can cause severe liver injury and adrenal gland problems, and said they should no longer be used for skin or nail fungal infections [18]. The US label now carries a warning that serious liver damage, including cases needing a transplant or ending in death, has happened with oral ketoconazole [19].
The same month, the European Medicines Agency recommended suspending the tablets across the EU because the risk of liver injury outweighed the benefit for fungal infections [20]. In the UK the tablets are now usually only used, on prescription, for a rare hormone condition called Cushing's syndrome [4].
Both regulators were clear that the creams and shampoos are not affected: very little is absorbed through the skin, and the FDA said the topical forms have not been linked to liver damage, adrenal problems or drug interactions [18, 20].
In the US, 1% ketoconazole shampoo is sold over the counter to control dandruff [7]. The 2% shampoo is prescription only, and its official label is for pityriasis versicolor, though dermatologists also prescribe it for seborrhoeic dermatitis [8]. Several of our experts make the same split: 1% at the drugstore, 2% from your doctor.
The UK is different. Most ketoconazole shampoos and creams can be bought in pharmacies and shops, and a 2% shampoo is sold there for dandruff and seborrhoeic dermatitis in adults and children over 12 [4, 9]. You need a prescription to treat pityriasis versicolor [4]. If you are not sure what your rash is, a pharmacist or GP is the right first stop.
Wet your hair, massage the shampoo into the scalp and leave the lather on for 3 to 5 minutes before rinsing [5, 9]. For dandruff or seborrhoeic dermatitis, the NHS suggests twice a week for 2 to 4 weeks, then once every 1 to 2 weeks to stop it coming back [5].
The UK labels and the US prescription label both say to leave it on [5, 8, 9], and our experts agree. The US over-the-counter 1% label simply says lather, rinse and repeat [7]. Dr Dray notes that shampoo makers argue a short lather is enough, but says leaving it on still tends to work better for her patients. The American Academy of Dermatology says some dandruff shampoos need 5 to 10 minutes on the scalp [10].
For flaky patches on the face, beard area or chest, dermatologists often have people lather the shampoo on the affected area, leave it a few minutes and rinse. DermNet lists ketoconazole cream once a day for 2 to 4 weeks for seborrhoeic dermatitis on the face [3]. For pityriasis versicolor, the NHS suggests the shampoo once a day for up to 5 days [5].
Dryness is the complaint our experts raise most, especially with longer hair. The US prescription label lists oiliness and dryness of the hair and scalp, changes in hair texture and loosening of permed curls among reported side effects [8], and the UK leaflet lists changes in hair texture as uncommon [9]. Use it on the scalp rather than the lengths, follow with conditioner, and alternate with another dandruff shampoo. The AAD suggests that people with coarse, curly or coily hair use dandruff shampoo about once a week [10].
Ketoconazole shampoo is a rinse-off treatment, so it sits easily alongside most routines. The usual rule still applies: add one new treatment at a time, so you can tell what your skin is reacting to.
Rotating is common advice. The AAD suggests alternating dandruff shampoos with different active ingredients if one is not working [10], and Dr. Jenny Liu rotates ketoconazole with a gentler selenium sulfide shampoo.
For hair loss, ketoconazole is an add-on, not the main treatment. Minoxidil and finasteride are the first-line treatments, and the reviews of ketoconazole describe it as a possible extra or alternative for people who need more [14, 17]. See our minoxidil and finasteride guides, and talk to a dermatologist about hair loss first, since its cause changes the treatment.
For seborrhoeic dermatitis, ketoconazole did about as well as steroid treatments in trials, with fewer side effects [1]. If you have been using a steroid cream or lotion regularly, the UK leaflet says to check with your doctor or pharmacist before starting the shampoo [9].
Ketoconazole is an antifungal used on the skin and scalp. The shampoo treats dandruff, seborrhoeic dermatitis and pityriasis versicolor, and the cream treats fungal infections such as athlete's foot, jock itch and sweat rash [4]. Dermatologists also use it for fungal acne and as an add-on for hair loss. The skincare experts we track recommend it.
Yes, it is one of the best studied options. A Cochrane review found the 2% strength cleared seborrhoeic dermatitis more often than placebo [1], and in a trial of 575 people, using it once a week afterwards cut relapses from 47% to 19% over six months [2]. Expect to keep using it now and then, since dandruff and seborrhoeic dermatitis tend to come back [3].
Leave the lather on your scalp for 3 to 5 minutes, then rinse, according to the NHS and the UK product leaflet [5, 9]. The US prescription shampoo says 5 minutes [8]. The US over-the-counter 1% label only says to lather and rinse [7], but the experts we track, among them Dr Dray and Dr. Jenny Liu, still advise leaving it on for a few minutes.
To clear dandruff or seborrhoeic dermatitis, the NHS suggests twice a week for 2 to 4 weeks, then once every 1 to 2 weeks to keep it away [5]. On other days, use your normal shampoo. If your scalp has not cleared within four weeks, the UK leaflet says to speak to a doctor or pharmacist [9].
It might help a little, as an extra. A 2020 review found five small human studies with thicker hair shafts and some visible improvement, and called for proper randomised trials [14]. Most studies were in men [17]. Experts like Doctorly and Dr. Mamina treat it as a low-effort add-on to treatments such as minoxidil, not a replacement. See a dermatologist first, because hair loss has many causes.
The 2% strength is the one most of the research uses, including the Cochrane review on seborrhoeic dermatitis [1, 2]. In the US, 2% needs a prescription and 1% is sold over the counter for dandruff [7, 8]. In the UK, a 2% dandruff shampoo is available from pharmacies [4, 9]. A 1% shampoo still reduced shedding in one trial of men with dandruff [16].
It can. The US prescription label lists dryness and oiliness of the hair and scalp, changes in hair texture and loss of curl in permed hair among reported side effects [8], and the UK leaflet lists changes in hair texture as uncommon [9]. Darnell Cox finds it turns her longer hair to straw. Focus it on the scalp, condition the lengths and alternate it with another shampoo.
Many dermatologists recommend it for seborrhoeic dermatitis on the face, used on the flaky patches for a few minutes and rinsed off. Dr. Shereene Idriss and Dr Dray both suggest it. DermNet also lists ketoconazole cream once a day for 2 to 4 weeks for the face [3]. Keep it out of your eyes, and stop if it stings or reddens.
Topical ketoconazole is among the treatments DermNet says work in most cases of Malassezia folliculitis, with antifungal tablets for resistant ones [11]. The hard part is knowing you have it. Fungal acne is itchy and its bumps are all the same size, it mostly affects the upper back and chest, and it is easily confused with acne, so a dermatologist should confirm it [11, 12, 13].
No. The tablets were restricted in the US in 2013 and suspended in the EU because they can cause serious liver injury, and they are no longer meant for skin or nail infections [18, 20]. Very little ketoconazole is absorbed from shampoos and creams, and the regulators said the topical forms are not affected [18, 20].
The NHS says you can use ketoconazole cream or shampoo in pregnancy and while breastfeeding, because only tiny amounts are absorbed [6]. The US prescription label notes there are no well-controlled studies in pregnant women [8]. Mention it to your midwife or doctor, and if you use it near the nipples, wash it off before feeding [6].
The dermatologists among our experts largely do, for dandruff, seborrhoeic dermatitis and as a hair loss add-on. Dr Dray, Dr. Shereene Idriss and Doctorly all recommend it, while Dr. Jenny Liu likes it for mild dandruff but finds it more drying than some alternatives. Altogether, the experts lean clearly in its favour.
11 experts, 17 mentions, every one traced to a video you can watch. Sponsored takes are excluded.
This guide combines two kinds of information. The expert consensus comes from 17 mentions of ketoconazole by 11 skincare experts in their YouTube videos. Each one was read, given a Yay, Mixed or Nay verdict and linked to the moment it was said. Sponsored takes are excluded. The research sections summarise published studies, product labels and medical sources, listed in full above.
The Guru Score measures how warmly the experts talk about ketoconazole shampoo and cream. It is not a measure of clinical effectiveness, and this guide is not medical advice. It has not been reviewed by a doctor.
This guide is general information, not medical advice. The Guru Score reflects how warmly the experts we track talk about ketoconazole; it is not a measure of clinical efficacy. Speak to a dermatologist or doctor about a diagnosed skin condition, and before using any medicine.
Dr. Mamina
Dr. Sam Ellis
The Budget Dermatologist