title: Cross-over study of the pharmacokinetics of cefonicid administered intravenously or intramuscularly to healthy adult humans.
abstract: The pharmacokinetics of cefonicid were investigated in eight healthy adults. A one-gram dose was administered either intramuscularly or intravenously in a cross-over design study. Mean peak cefonicid plasma concentrations of 186 to 204 mcg/ml and 88 to 123 mcg/ml were achieved after intravenous and intramuscular injection, respectively, with elimination half-lives of 4.9 h and 5.3 h. Cefonicid concentrations were measured by both microbiological (M.A.) and high-performance liquid chromatography (HPLC) assays. Results were quite similar with the two techniques, except for the urinary recovery of cefonicid in the first 24 hours (83% of the dose with MA - vs 53% with HPLC method). The apparent volume of distribution (Vd area) was 0.18 1/kg; the total body clearance (CT) and the renal clearance (CR) were 24-26 ml/min and 15-19 ml/min, respectively. The kinetic data of cefonicid were not significantly different for the two routes of administration. A one-gram i.v. or i.m. cefonicid dose produced high and prolonged plasma concentrations with a longer half-life than obtained with commonly used cephalosporins.
mesh_terms: D000328:Adult; D001412:Bacillus subtilis / Q000187:drug effects; D002435:Cefamandole / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000097:blood / Q000378:metabolism; D015790:Cefonicid; D002851:Chromatography, High Pressure Liquid; D006801:Humans; D007273:Injections, Intramuscular; D007275:Injections, Intravenous; D007700:Kinetics; D008297:Male
chemical_list: D002435:Cefamandole; D015790:Cefonicid