Itraconazole USP For Compounding (API)Itraconazole USP is an active pharmaceutical ingredient used in medications to treat fungal infections. It belongs to a class of medications known as azole antifungals and works by inhibiting the growth of certain types of fungi. It is commonly used to treat infections of the skin, nails, mouth, and respiratory system. Itraconazole USP is approved by the United States Pharmacopeia (USP), which sets quality standards for pharmaceutical ingredients.