ringworm , candidiasis (thrush), serious systemic infections such as cryptococcal meningitis , and others. Such drugs are usually obtained by a doctor's prescription or purchased over-the-counter . Contents 1 Mode of action 2 Precaution 3 Classes 3.1 Polyene antifungals 3.2 Imidazole, triazole, and thiazole antifungals 3.2.1 Imidazoles 3.2.2 Triazoles 3.2.3 Thiazoles