Itraconazole 200 is an antifungal medication used to treat fungal infections such as aspergillosis, blastomycosis, histoplasmosis, and certain types of candidiasis. It belongs to the azole class of antifungal drugs. Itraconazole works by inhibiting the production of ergosterol, a component of fungal cell membranes. This disrupts the fungal cell membrane, leading to the death of the fungal cells and clearance of the infection.