Anidulafungin (brand names Eraxis (in U.S. and Russia) and Ecalta (in Europe)) is a semi-synthetic echinocandin with antifungal activity and it is active in vitro against many Candida, as well as some Aspergillus. Like other echinocandins, anidulafungin is not active against Cryptococcus neoformans, Trichosporon, Fusarium, or zygomycetes. This drug is indicated for the treatment of candidemia and the following Candida infections: intra-abdominal abscess and peritonitis; and for the treatment of esophageal candidiasis. Anidulafungin inhibits glucan synthase, an enzyme present in fungal, but not mammalian cells. This results in inhibition of the formation of 1,3--D-glucan, an essential component of the fungal cell wall.