The generic name of Spironolactone is Itraconazole Capsules. When treating gray nails (also known as nail fungal disease), it includes two kinds of continuous treatment and shock therapy, usually oral administration of 2 capsules (0.2g) per day. 1. Continuous treatment: for toenails, involved or not involved nails, oral medication 0.2g (2 capsules), once a day, continuous treatment for about three months. 2. Shock therapy:For toenails, involved or not involved in the nail, the first week of the drug twice a day, each time the drug 0.2g, and then to the fifth week and the ninth week in accordance with the first week of the drug; only hand nail fungal infections, then in the first and fifth weeks in accordance with the above amount of drugs, the drug can be. Improper use of itraconazole capsules can cause confusion, nausea and vomiting, dizziness and drowsiness and other adverse reactions, allergic to any of the components of the product is prohibited. It is recommended that patients diagnosed with nail fungal disease, timely to the regular hospital dermatology consultation, under the guidance of a professional physician reasonable use of medication, not blindly self-medication.