Itraconazole is a synthetic triazole derivative. It is a synthetic broad-spectrum antifungal drug. Its antibacterial spectrum and antibacterial mechanism are similar to clotrimazole, but it has strong antibacterial activity against Aspergillus. The permeability of fungal cell membrane exerts antibacterial activity, and it has antibacterial activity against pathogens of superficial and deep fungal infections. Its antibacterial spectrum is broader and stronger than ketoconazole. It can inhibit the synthesis of fungal cell membrane ergosterol, thereby exerting antifungal effect. This product is effective against dermatophytes (Trichophyton, Microsporum, Epidermophyton flocculus), yeasts (Cryptococcus neoformans, Saccharomyces sp., Candida (including Candida albicans, Candida glabrata and Candida krusei)], Aspergillus, Histoplasma, Paracoccosis Brazil, Sporothrix schenckii, Color fungi, Cladosporium, Blastomyces dermatitis, and various other yeasts and fungi Has an inhibitory effect. But itraconazole cannot inhibit the growth of Rhizopus and Mucor.