title: Letter: Beta-blocking drugs.
mesh_terms: D000319:Adrenergic beta-Antagonists / Q000627:therapeutic use*; D006801:Humans; D006973:Hypertension / Q000188:drug therapy*; D010869:Pindolol / Q000008:administration & dosage; D011433:Propranolol / Q000008:administration & dosage / Q000627:therapeutic use
chemical_list: D000319:Adrenergic beta-Antagonists; D011433:Propranolol; D010869:Pindolol