Anidulafungin is primarily used as an antifungal medication to treat serious fungal infections, particularly those caused by Candida species. It is often administered in hospital settings for patients with invasive candidiasis, including candidemia and other forms of Candida infections in the bloodstream, abdomen, or other internal organs. The drug is effective against strains that may be resistant to other antifungal agents, making it a critical option for managing difficult-to-treat infections. It is typically given intravenously and is favored for its minimal drug interactions and relatively low risk of side effects compared to other antifungals. Anidulafungin is also used as a prophylactic treatment in high-risk patients, such as those undergoing organ transplants or chemotherapy, to prevent fungal infections. Its targeted mechanism of action, which involves inhibiting the synthesis of fungal cell walls, ensures it is highly effective against a broad spectrum of Candida species.