title: Cephalexin in the prevention of purulent exacerbations of chronic bronchitis.
mesh_terms: D000328:Adult; D000368:Aged; D001991:Bronchitis / Q000188:drug therapy*; D002506:Cephalexin / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use; D002511:Cephalosporins / Q000627:therapeutic use*; D002908:Chronic Disease; D002986:Clinical Trials as Topic; D006801:Humans; D008297:Male; D008875:Middle Aged; D010919:Placebos; D013492:Suppuration / Q000188:drug therapy*
chemical_list: D002511:Cephalosporins; D010919:Placebos; D002506:Cephalexin