Mycamine is a sterile, lyophilized product for intravenous (IV) infusion that contains micafungin sodium. Micafungin sodium is a semisynthetic lipopeptide (echinocandin) synthesized by a chemical modification of a fermentation product of Coleophoma empetri F-l 1899. Micafungin inhibits the synthesis of 1, 3-?-D-glucan, an integral component of the fungal cell wall.