Ketoconazole shampoo for hair loss: does Nizoral help? 6 questions about dandruff, 1% or 2% and minoxidil

Ketoconazole shampoo, such as Nizoral, is an antifungal shampoo that is mainly intended against dandruff and seborrheic eczema on the scalp. It is not a main treatment for hereditary hair loss, but a possible addition. A few small studies show less hair loss and slightly thicker hair, especially in people who also have dandruff. The strongest evidence for hereditary hair loss remains for minoxidil. In addition to thinning hair, do you also suffer from flakes, itching or an oily scalp? Then a ketoconazole shampoo two to three times a week can be a logical addition to your minoxidil routine. In this blog you can read what the research really says, how to combine the two and what you should pay attention to.

In this article

• What is ketoconazole shampoo and what is it intended for?
• Does ketoconazole shampoo help against hair loss?
• What is the difference with minoxidil?
• Nizoral 1% or ketoconazole 2%: does it matter?
• How do you combine ketoconazole shampoo with minoxidil?
• What side effects and warnings are there?
• Frequently asked questions
• Sources

What is ketoconazole shampoo and what is it intended for?

Ketoconazole is a substance that kills fungi and yeasts kills.^[2] A yeast naturally lives on everyone's scalp, Malassezia (also known as Pityrosporum ovale). In people with seborrheic eczema, the yeast is present in larger quantities on the skin and the immune system reacts with inflammation. This causes redness and flakes.^[1]

Dandruff is the mildest form of seborrheic eczema, according to the Dutch Association for Dermatology. It concerns fine flakes on the hairy head, sometimes with itching. Seborrheic eczema occurs in approximately 5% of the population and is not contagious.^[1] Skin doctors often prescribe a shampoo with ketoconazole.^[1]

The official use of ketoconazole shampoo is the scalp, not hair growth. The interest from the hair loss world stems from the idea that an inflamed scalp is also bad for the hair follicles. On international forums such as Reddit, ketoconazole shampoo is therefore often mentioned as a permanent part of a hair loss routine, in addition to minoxidil.

Does ketoconazole shampoo help against hair loss?

The honest answer: there are hopeful signs, but the evidence is limited. These are the most important studies:

• Study from 1998 (2% ketoconazole): people with hereditary hair loss used a 2% ketoconazole shampoo or a regular shampoo, with or without 2% minoxidil. Hair density, hair thickness and the proportion of hairs in the growth phase improved approximately as much with ketoconazole as with minoxidil. The researchers themselves write that larger, controlled research is needed.^[4]
• Study from 2002 (1% ketoconazole): 150 men with hereditary hair loss, increased hair loss and dandruff used an anti-dandruff shampoo 2 to 3 times a week for 6 months. In the ketoconazole group, hair loss decreased by 17.3% and average hair thickness increased by 5.4%. Hair density on the crown remained the same.^[5]
• 2020 review study: seven studies were summarized, five of which were in humans (318 participants in total). The conclusion: ketoconazole is a promising additional treatment, but randomized studies are needed.^[6]

In short: ketoconazole shampoo does not allow bald spots to regrow and is not a substitute for a proven hair loss product. It does seem to help keep the scalp calm and prevent hair loss, especially if dandruff or flakes are involved.

What is the difference between ketoconazole shampoo and minoxidil?

The two do a completely different job. Ketoconazole shampoo works on the scalp: it inhibits yeast and reduces flaking. Minoxidil is a remedy against hereditary hair loss that you apply to the scalp twice a day and that focuses on the hair follicles.^[8] According to Apotheek.nl, it starts to work approximately after 4 months, and if it works you should continue to use it.^[7]

That is why you often see the combination: minoxidil as a basis for hair growth, ketoconazole shampoo as support for the scalp. Are you using minoxidil and do you experience more loss in the first few weeks? This is often the well-known temporary loss phase, read more about it in our blog about minoxidil shedding.

Nizoral 1% or ketoconazole 2%: does it matter?

Ketoconazole shampoo comes in 1% and 2%. In the Netherlands there are 2% variants (20 mg ketoconazole per gram) with an official leaflet for seborrheic eczema.^[3] The Nizoral Anti-dandruff Shampoo at Minodeals contains 1% ketoconazole.

There is no study that directly compares 1% and 2% on hair loss. The 1998 hair study used 2%,^[4] the larger study from 2002 used 1%. In the latter study, hair loss decreased and the hair became thicker on average.^[5] If you want to use the shampoo mainly for your scalp in addition to minoxidil, then 1% is an excellent and mild start. Do you have persistent seborrheic eczema with red, greasy flakes? Then have it assessed by your doctor, who will prescribe a 2% variant if necessary.

Scalp care

Nizoral Anti-dandruff Shampoo 1%

Anti-dandruff shampoo with 1% ketoconazole, to be used in addition to your minoxidil routine. Available in 200 ml and 400 ml.

from €44.99View Nizoral →

How do you combine ketoconazole shampoo with minoxidil?

The most important thing: wash your hair with the shampoo, let your scalp dry completely and then apply minoxidil. Minoxidil belongs on a completely dry scalp and dry hair.^[7]

1. Use the shampoo 2 to 3 times a week. That is the frequency from the hair studies.^[5] For seborrheic eczema, the package leaflet recommends at least 2 times a week.^[2] On the other days you can use a mild regular shampoo.
2. Massage the shampoo into your wet scalp, not just in your hair. It concerns the skin.
3. Leave on for 3 to 5 minutes and then rinse well with lukewarm water.^[2]
4. Dry your hair and scalp completely, with a towel or a hairdryer on a low setting.
5. Then apply minoxidil according to the package leaflet: with the 5% solution, 1 ml at a time, twice a day, with a maximum of 2 ml per day.^[8]

Are you hesitating between a foam or a lotion, for example because your scalp becomes easily irritated? You can read the differences in our blog minoxidil foam or lotion read the differences.

Minoxidil foam

Kirkland Minoxidil Foam 5% for men

Minoxidil 5% as foam, dries quickly and is a handy base in addition to a ketoconazole shampoo.

from €34.99View the foam →

For a sensitive scalp

Foligain Lotion 5% for men, Sensitive Skin

Minoxidil 5% lotion in a variant for sensitive skin, for those who easily suffer from an irritated scalp.

from €64.99View Foligain →

What side effects and warnings should you know?

Ketoconazole shampoo is usually well tolerated. Possible side effects include a burning sensation and skin irritation, which usually pass quickly.^[2] The package leaflet of a 2% shampoo also lists inflamed hair follicles, dry skin, itching and, remarkably, abnormal hair loss or thinning hair and an altered hair structure as uncommon side effects.^[3] If you notice that your hair is getting worse, stop and consult your pharmacist. Rinse well if the shampoo gets into your eyes. Are you pregnant? Please consult your doctor first.^[3]

Minoxidil is not suitable for everyone. According to the package leaflet, do not use it if you are younger than 18 or older than 65, if you are pregnant or breastfeeding, or if your scalp is inflamed or damaged. If you have heart problems or use blood pressure lowering drugs, consult your doctor first. Stop immediately and contact a doctor if you experience chest pain, rapid heartbeat, dizziness or sudden swelling of the face, hands or ankles.^[8]

Go to the doctor if your hair loss starts suddenly, if you develop bald spots, if your scalp remains red and flaky despite a few weeks of treatment, or if you are unsure about the cause. Hair loss due to, for example, a thyroid problem, iron deficiency or pregnancy requires a different approach; According to the package leaflet, minoxidil is not intended for this purpose.^[8] Ketoconazole shampoo also does not solve these types of causes.

Frequently asked questions

How often per week do you use ketoconazole shampoo for hair loss?

In the studies on hair loss, the shampoo was used 2 to 3 times a week for 6 months. Allow the shampoo to work for 3 to 5 minutes before rinsing. On the other days you can use a mild regular shampoo.

Can I use Nizoral and minoxidil on the same day?

Yes. First wash your hair with the shampoo, dry your scalp completely and then apply minoxidil. Minoxidil belongs on a dry scalp. Please adhere to the instructions for both products.

Does ketoconazole shampoo regrow my hair?

There is no good evidence for that. In a study with 150 men, hair loss decreased and hair became slightly thicker, but hair density remained the same. Think of it as support for the scalp, not as a replacement for minoxidil. Results differ per person.

Is ketoconazole shampoo also suitable for women?

The best-known hair studies have been done on men. Ketoconazole shampoo is used against dandruff and seborrheic eczema in both men and women. If you are pregnant or want to become pregnant, consult your doctor or pharmacist first.

Can ketoconazole shampoo cause hair loss?

It is stated in the package leaflet of a 2% shampoo as a side effect that sometimes occurs, just like an altered hair structure. If you notice more hair loss or dry, brittle hair since using the shampoo, stop and consult your pharmacist.

This article is general information and does not replace medical advice. Always read the package leaflet and, if in doubt, consult your doctor or pharmacist. Prices are from October 2026.

Sources

1. Dutch Association for Dermatology and Venereology (NVDV), Seborrheic eczema
2. Apotheek.nl, Ketoconazole on the scalp
3. Medicine Evaluation Board, Package leaflet Ketoconazole 20 mg/g shampoo (RVG 30871)
4. Piérard-Franchimont C. et al., Dermatology 1998, Ketoconazole shampoo: effect of long-term use in androgenic alopecia (English)
5. Piérard-Franchimont C. et al., International Journal of Cosmetic Science 2002, Nudging hair shedding by antidandruff shampoos. A comparison of 1% ketoconazole, 1% piroctone olamine and 1% zinc pyrithione formulations (English)
6. Dermatologic Therapy 2020, Topical ketoconazole for the treatment of androgenetic alopecia: A systematic review (English)
7. Apotheek.nl, Minoxidil on the skin
8. Medicine Evaluation Board, Package leaflet Minoxidil Teva 50 mg/ml solution for cutaneous use