Children ≥ 2 years: 3.3 - 6.6 mg/kg/day as a single dose for 1 - 2 weeks for candidiasis, for at least 4 weeks in recalcitrant dermatophyte infections, and for up to 6 months for other systemic mycoses.
Adults: The recommended starting dose of ketoconazole is a single daily administration of 200 mg. In very serious infections or if clinical responsiveness is insufficient within the expected time, the dose of ketoconazole may be increased to 400 mg once daily. Minimum treatment for candidiasis is 1 or 2 weeks. Minimum treatment for recalcitrant dermatophyte infections is 4 weeks in cases involving glabrous skin. Minimum treatment for the other indicated systemic mycoses is 6 months.