title: Individualising gentamicin dosage regimens. A comparative review of selected models, data fitting methods and monitoring strategies.
abstract: The various components required for individualising clinical drug dosage regimens are reviewed, including a study of 3 types of fitting procedures, 2 types of gentamicin pharmacokinetic model and the utility of D-optimal times for obtaining serum gentamicin concentrations. The combination of the current Bayesian fitting procedure, the kslope pharmacokinetic model [in which the elimination rate constant (kel) can change from dose to dose with changing creatinine clearance] and the explicit measurement of the assay error pattern yielded predictions of future serum gentamicin concentrations which were (a) slightly better than those found using weighted nonlinear least squares; (b) somewhat better than those found with Bayesian fitting and a fixed-kel model; (c) better than those found using the traditional linear regression fitting procedure and a fixed kel model. D-Optimally timed pairs of concentrations also predicted future concentrations at least as well, and more cost effectively.
authors.affiliation: Laboratory of Applied Pharmacokinetics, University of Southern California, School of Medicine, Los Angeles.
authors.forename: R W
authors.initials: RW
authors.lastname: Jelliffe
authors.forename: T
authors.initials: T
authors.lastname: Iglesias
authors.forename: A K
authors.initials: AK
authors.lastname: Hurst
authors.forename: K A
authors.initials: KA
authors.lastname: Foo
authors.forename: J
authors.initials: J
authors.lastname: Rodriguez
mesh_terms: D003627:Data Interpretation, Statistical; D004305:Dose-Response Relationship, Drug; D016903:Drug Monitoring / Q000379:methods*; D005839:Gentamicins / Q000008:administration & dosage*; D006801:Humans; D008954:Models, Biological
chemical_list: D005839:Gentamicins