the bioavailability of propylthiouracil ( about 80 % ) was unchanged by the surgical procedure but the fraction of ampicillin ( given as pivampicillin ) absorbed decreased from a preoperative value of 109 +/- 44 % to 44 +/- 30 % 12 months after the bypass operation .
C0002680
ampicillin
C0032032
pivampicillin