title: Verapamil in angina: a double-blind trial.
mesh_terms: D000787:Angina Pectoris / Q000188:drug therapy*; D000889:Anti-Arrhythmia Agents / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009570:Nitriles / Q000627:therapeutic use*; D010630:Phenindione / Q000627:therapeutic use; D010919:Placebos
chemical_list: D000889:Anti-Arrhythmia Agents; D009570:Nitriles; D010919:Placebos; D010630:Phenindione