<qa>  What is fluconazole used to treat life-threatening fungal infections due to?Fluconazole is an FDA-approved drug that is widely used to treat fungal infections due to candida. The experimental drug anidulafungin has been found to be active in treating life-threatening fungal infections. The purpose of this study is to determine whether anidulafungin is as effective as fluconazole in treating candidemia, an invasive form of candidiasis. 