to compare the efficacy and unwanted effects of amoxycillin and ampicillin in the treatment of acute exacerbations of chronic bronchitis , 199 patients were recruited from 28 centres into a double-blind between-patient comparison of four regimens : ampicillin 250 mg or 500 mg , amoxycillin 250 mg or 500 mg , each given orally three times daily for seven days .
C0002645
amoxycillin
C0002680
ampicillin