What are the side effects of Ketoconazole?

Potential side effects include: Scalp dryness and irritation, Changes in hair texture, Oily or dry scalp (paradoxical), Contact dermatitis (rare).

Does ketoconazole shampoo help with hair loss?

Ketoconazole is an antifungal agent that may also have mild anti-androgenic properties. A study comparing 2% ketoconazole shampoo to 2% minoxidil found similar improvements in hair density and follicle size. Research suggests it may be a useful adjunct to other hair loss approaches, particularly when scalp inflammation or dandruff is present.

How does ketoconazole shampoo support hair growth?

Ketoconazole may support hair growth through two mechanisms: its antifungal properties reduce Malassezia yeast on the scalp (which contributes to inflammation that can affect hair follicles), and it has mild 5-alpha-reductase inhibitory activity that may reduce DHT at the follicle level. Research across 17 studies with 5,154 participants for androgenetic alopecia has earned Grade A (Strong) evidence.

How often should I use ketoconazole shampoo for hair loss?

Clinical studies on ketoconazole for androgenetic alopecia typically used 2% ketoconazole shampoo two to three times per week, left on the scalp for 3 to 5 minutes before rinsing. The evidence from 17 studies with 5,154 participants supports this intermittent protocol. Daily use is generally not necessary and may dry out the scalp. Many clinicians recommend it as an adjunct to primary treatments like minoxidil rather than as a standalone therapy.

Is ketoconazole shampoo safe for long-term use?

Ketoconazole 1-2% shampoo is generally considered safe for long-term use when used as directed two to three times per week. Potential side effects include scalp dryness, irritation, or temporary increased shedding when first starting use. Systemic absorption from topical/shampoo formulations is minimal. The safety profile across 17 studies with 5,154 participants supports its continued use as part of a hair loss management routine.

Can ketoconazole shampoo help with scalp psoriasis hair loss?

Yes — ketoconazole shampoo has Grade A (Strong) evidence for scalp psoriasis hair loss from 2 studies with 4,586 participants. Its antifungal action reduces Malassezia colonization, which is thought to trigger or worsen scalp psoriasis flares. By reducing scalp inflammation and flaking, ketoconazole may help support the follicle environment needed for normal hair growth in people with psoriasis-related hair loss.

Ketoconazole

antifungal

Also known as: Nizoral

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About

Ketoconazole is an antifungal with anti-androgenic properties when applied topically. As a shampoo, it may reduce scalp inflammation, dandruff, and local DHT activity. Some studies suggest it may complement other hair loss treatments like minoxidil and finasteride.

How It Works

Antifungal with anti-androgenic properties; reduces scalp inflammation and may disrupt local androgen activity.

Evidence For Conditions

Condition	Grade	Studies	Participants
Androgenetic Alopecia	A	19	5154	View →
Scalp Psoriasis Hair Loss	A	2	4586	View →

Side Effects

Scalp dryness and irritation
Changes in hair texture
Oily or dry scalp (paradoxical)
Contact dermatitis (rare)

Drug & Supplement Interactions

Other topical hair treatments (apply at separate times)
Systemic ketoconazole has many interactions but topical has minimal systemic absorption

Always inform your healthcare provider about all supplements you take.

Quick Facts

Dosage: Topical: 2% shampoo, 2-3x/week
Forms: topical
Upper Limit: Topical only for hair loss
Best Time: Lather on scalp and leave for 3-5 minutes before rinsing; use 2-3 times per week

Evidence Summary

Androgenetic Alopecia A

Scalp Psoriasis Hair Loss A

FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.