title: A comparison of pivampicillin and ampicillin in exacerbations of chronic bronchitis.
mesh_terms: D000368:Aged; D000667:Ampicillin / Q000008:administration & dosage* / Q000009:adverse effects / Q000494:pharmacology / Q000627:therapeutic use; D001991:Bronchitis / Q000188:drug therapy* / Q000382:microbiology; D002986:Clinical Trials as Topic; D006193:Haemophilus influenzae / Q000187:drug effects; D006801:Humans; D008297:Male; D008875:Middle Aged; D013183:Sputum / Q000032:analysis / Q000187:drug effects; D013291:Streptococcus / Q000187:drug effects; D014631:Valerates / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use
chemical_list: D014631:Valerates; D000667:Ampicillin