Atenolol interacts with anesthetics, antidiabetic agents - oral or insulin, antihypertensives, diuretics, antiinflammatory analgesics, nonsteroidal (NSAIA), calcium channel blocking agents, cimetidine, clonidine, diazoxide, digitalis glycosides, lidocaine, nicotine, phenothiazines, reserpine, sympathomimetics, timolol and xanthines.