Ketoconazole is an antifungal medication that fights infections caused by fungus. Ketoconazole is not for use in treating fungal infections of the fingernails or toenails. This medicine is also not for use in treating prostate cancer or Cushing syndrome. This medicine should be used only when you cannot use other antifungal medications. Ketoconazole can cause serious harm to your liver that may result in liver transplant or cause death.
What is the dosage for Ketoconazole? Ketoconazole may be taken with or without food. The oral dose range is 200-400 mg daily. Recurrent tinea versicolor is treated with 400 mg monthly. Topical formulations are administered to affected areas once or twice daily.