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Ketoconazole disrupts fungal cell membrane ergosterol synthesis by inhibiting CYP51A1, killing Malassezia yeast that drives seborrheic dermatitis and dandruff. It also has weak anti-androgenic properties by inhibiting adrenal and gonadal androgen synthesis at the scalp level.
Commercial ketoconazole shampoo (Nizoral 1%, 2%) is available OTC at 1% and by prescription at 2%. Compounding allows custom concentrations, scalp solution formulations, and combination with minoxidil or spironolactone for comprehensive hair loss regimens.
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Ketoconazole 2% shampoo is a standard treatment for seborrheic dermatitis and dandruff, targeting Malassezia yeast that triggers the condition. Beyond its antifungal use, ketoconazole has documented weak anti-androgenic properties at the scalp — making it a useful adjunct in hair loss protocols.
Studies show that 2% ketoconazole used 2–3x weekly as a scalp wash can improve hair density as an adjunct to minoxidil, likely through its anti-androgen and anti-inflammatory effects on the follicular environment.
Seborrheic dermatitis (dandruff), tinea versicolor, pityrosporum folliculitis (fungal acne), hair loss adjunct (anti-androgenic scalp effect)
Shampoo (2%): Apply to scalp, leave 3–5 minutes, rinse; use 2–3x weekly for dandruff; weekly maintenance
Scalp solution (2%): Apply 1mL to affected scalp once daily as part of hair loss regimen
Mild scalp dryness, occasional irritation, rare allergic contact dermatitis. Very low systemic absorption with topical/shampoo use. Possible hair texture changes with frequent use.
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