Oral fungal drugs include itraconazole capsules, fluconazole tablets, terbinafine tablets and so on. 1. Itraconazole capsule: it is a broad-spectrum antifungal drug, which can inhibit the synthesis of ergosterol in the cell membrane of fungi by inhibiting the CYP-dependent enzyme of sensitive fungi, thus playing a role in the treatment of fungi. It is contraindicated in case of hypersensitivity to itraconazole and in patients suffering from congestive heart failure, etc. Avoid the production of abdominal pain, rash, angioneurotic edema, hypokalemia and other adverse reactions. 2. Fluconazole tablets: can interfere with the activity of fungal cytochrome P-450, inhibit the biosynthesis of ergosterol on the fungal cell membrane, and then achieve therapeutic effects. If the fluconazole tablets components of patients allergic to prohibit the use. Avoid diarrhea, thrombocytopenia, headache and other adverse reactions. 3. Terbinafine tablets: belongs to a kind of acrylamide antifungal drugs, mainly inhibit the keratinocyclooxygenase and inhibit the biosynthesis of ergosterol, which is the basic ingredient of fungal cell membrane, so as to play a role in the treatment of fungi. For terbinafine allergic patients and patients with severe hepatic and renal insufficiency is prohibited. Avoid the occurrence of adverse reactions such as urticaria, hepatic impairment and jaundice. As there are many oral fungal medications, it is recommended that patients go to a professional hospital and under the guidance of the doctor to undergo relevant medical examinations to determine the type of fungus and then choose the appropriate medication and use it according to the doctor’s instructions.