A benzothiazepine is a chemical heterocyclic compound characterized by a benzene ring fused to a seven-membered thiazepine ring (for example: Diltiazem, a calcium channel blocker used to treat hypertension and angina pectoris), but the class also has other pharmacological activities (anticancer, etc.). Be careful not to confuse it with benzodiazepines, which are depressants of the central nervous system (anxiolytics, sleeping pills). Used as building blocks of Multi-target drug ligand MTDL