in patients with pleural effusions due to malignant disease , estimations of ampicillin were made on simultaneously obtained samples of blood and pleural fluid : ( 1 ) from patients ( n=11 ) after the administration of a single dose of 400 mg of bacampicillin , and ( 2 ) from patients undergoing treatment with 800 mg of bacampicillin twice daily ( a ) during the 12 hours after the first dose ( n=10 ) and ( b ) during the 7 hours after the third dose ( n=9 ) .
C0002680
ampicillin
C0052865
twice daily