Metoprolol Tartrate interacts with anesthetics, Antidiabetic agents - oral or insulin, Antihypertensives, Diuretics, Antiinflammatory analgesics, nonsteroidal (NSAID), Calcium Channel blocking agents. Cimetidine, Clonidine Diazoxide, Digitalis Glycosides Lidocaine, Nicotine, Phenothiazines, Reserpine, Sympathomimetics, Timolol and Xanthines.