Ketoconazole is an antifungal medication that is used to treat fungal infections, including those of the skin and scalp. It is available in topical and oral forms and is often used to treat conditions such as dandruff and seborrheic dermatitis. While ketoconazole is generally considered to be safe and effective, some people may experience hair loss as a side effect of using the medication. This is typically due to the drying and irritating effects of the medication on the scalp and hair. Hair loss due to ketoconazole is usually temporary and should resolve once the treatment is stopped