Fluconazole is an antifungal medication that is primarily used to treat a variety of fungal infections. It works by inhibiting the growth of fungi by interfering with the synthesis of ergosterol, an essential component of fungal cell membranes. This leads to the disruption of the cell membrane, ultimately causing the death of the fungal cells. Fluconazole is commonly used for treating infections such as vaginal yeast infections, oral thrush, and systemic infections like cryptococcal meningitis. It can be taken orally or intravenously, depending on the severity of the infection. Fluconazole is typically well-tolerated, though it can interact with certain other medications and cause side effects such as headaches, nausea, or abdominal pain.