One in a class of antibiotics that includes Biaxin, Clarithromycin , Ery-Tab, and Erythromycin . See the entire definition of Macrolide

The macrolides are a group of drugs (typically antibiotics) whose activity stems from the presence of a macrolide ring, a large lactone ring to which one or more deoxy sugars, usually cladinose and desosamine, are attached. The lactone ring can be either 14, 15 or 16-membered. Macrolides belong to the polyketide class of natural products.