This document discusses tetracycline antibiotics. It begins with an introduction describing tetracyclines as broad spectrum antibiotics produced by bacteria. It then classifies tetracyclines based on duration of action and describes the structure of tetracycline. The document outlines the mechanism of action as inhibition of bacterial protein synthesis and mechanisms of resistance such as efflux pumps. It lists the various uses of tetracycline and potential side effects before discussing drug interactions and storage considerations.