an unblinded , randomized , prospective clinical trial of cefaclor , 250 mg twice daily , versus ampicillin , 500 mg four times daily , for a total of ten days of therapy , was conducted with 100 patients presenting to an emergency department with signs , symptoms , and urinalysis results suggestive of urinary tract infection ( uti ) .
C0007537
cefaclor
C0042029
of urinary tract