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  • Title: [Pharmacokinetic and clinical studies on sulbactam/ampicillin in the pediatric field].
    Author: Yanagishima M, Yanai M, Yanagi T, Tsuji Y, Nakayama N, Imamura H.
    Journal: Jpn J Antibiot; 1989 Mar; 42(3):754-65. PubMed ID: 2746855.
    Abstract:
    Pharmacokinetic and clinical studies of sulbactam/ampicillin (SBT/ABPC) were conducted and the obtained results are summarized as follows. For pharmacokinetic investigation, SBT/ABPC at 30 or 60 mg/kg was administered by intravenous drip infusion over 30 minutes. The maximum blood concentration was reached just after the completion of the drip infusion in both groups. The mean peak serum concentrations of SBT and ABPC were 22.4 +/- 0.8 micrograms/ml and 32.8 +/- 1.0 micrograms/ml, respectively, in the 30 mg/kg group, and they were 54.2 micrograms/ml and 93.8 micrograms/ml, respectively, in the 60 mg/kg group. The concentrations were dose-related. The mean half-lives of SBT and ABPC following 30 mg/kg SBT/ABPC administration were 0.91 +/- 0.04 hour and 0.90 +/- 0.05 hour, respectively, and those following 60 mg/kg SBT/ABPC were 1.08 hours and 0.84 hour, respectively. The highest urinary concentration occurred 0-2 hours after the 30 minutes drip infusion. Mean urinary excretion rate of SBT and ABPC over 6 hours were 71.4 +/- 2.5% and 54.6 +/- 3.3%, respectively, in the 30 mg/kg group, and they were 80.0% and 63.7%, respectively, in the 60 mg/kg group. In the clinical investigation conducted with a total of 24 patients (15 with respiratory tract infections, 3 with urinary tract infections, 2 with lymphadenitis, and others), SBT/ABPC was found to be excellent in 14 cases, good in 9, fair in 1. The efficacy rate was, therefore, 95.8%. In the bacteriological evaluation, 9 out of 11 clinically isolated strains were eradicated, 1 unchanged and 1 unknown. The elimination rate was 90.0%. Regarding side effects, no abnormal clinical symptoms were observed. As abnormal laboratory values, a slight elevation of GOT was observed.
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