Intravenous ampicillin pharmacokinetics in the third trimester of pregnancy.
The pharmacokinetics of a single dose of intravenous ampicillin were studied in nine patients during their third trimester of pregnancy. Each volunteer was given either 500 mg (5.7-8.8 mg/kg) or 1 g (15.4-21.4 mg/kg) of sodium ampicillin by rapid infusion. Postinfusion plasma concentration-time curves followed biexponential decay in all subjects. Calculated parameters included a mean plasma distribution volume of 177.1 +/- 97.5 ml/kg, tissue or peripheral distribution volume of 246.2 +/- 143.9 ml/kg, elimination half-life of 1.60 +/- 0.51 h, and total body clearance of 4.59 +/- 1.48 ml/min/kg. Dose-dependent disposition was not observed. Gestation-specific drug therapy research during pregnancy is discussed.
D000667:Ampicillin / Q000378:metabolism*; D005260:Female; D006801:Humans; D007263:Infusions, Parenteral; D007700:Kinetics; D011247:Pregnancy; D011263:Pregnancy Trimester, Third; D012079:Renal Circulation
D000667:Ampicillin