Fusidic acid is an antibiotic obtained by the fermentation of a certain fungus. It is mainly used locally for infections of the eyes and skin. It is mainly effective against gram-positive bacteria. In some cases, fusidic acid may also be given orally or as an infusion.
Fusidic acid is available by prescription and in most cases is given as a cream or ointment. In tablet form, it is available as the salt sodium fusidate.