Fluconazole is a medication used to treat fungal infections. It works by stopping the growth of fungi, making it effective against conditions like candidiasis and cryptococcal meningitis. Doctors often prescribe it for patients with weakened immune systems, such as those with HIV/AIDS or those undergoing chemotherapy. This medication is usually taken by mouth in the form of a tablet or liquid, but it can also be given through an injection. While fluconazole is generally safe, some people may experience side effects like nausea or headaches. It's important to follow a doctor's instructions when using this medication to ensure the best results.