title: A comparison of pivampicillin and tetracycline in exacerbations of chronic bronchitis.
mesh_terms: D000284:Administration, Oral; D000368:Aged; D000667:Ampicillin / Q000008:administration & dosage / Q000009:adverse effects / Q000031:analogs & derivatives* / Q000627:therapeutic use; D001991:Bronchitis / Q000188:drug therapy* / Q000382:microbiology; D002908:Chronic Disease; D002986:Clinical Trials as Topic; D005500:Follow-Up Studies; D006193:Haemophilus influenzae / Q000302:isolation & purification; D006801:Humans; D008297:Male; D008875:Middle Aged; D013183:Sputum / Q000382:microbiology; D013291:Streptococcus / Q000302:isolation & purification; D013752:Tetracycline / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D013997:Time Factors
chemical_list: D000667:Ampicillin; D013752:Tetracycline