title: Pharmacokinetics of dideoxyinosine in pigtailed macaques (Macaca nemestrina) after intravenous and subcutaneous administration.
abstract: Four macaques (Macaca nemestrina; 1 female and 3 males) were administered dideoxyinosine (DDI) at three dose levels (3.2 mg/kg i.v., 10 mg/kg i.v., and 20 mg/kg s.c.). Blood and urine samples were collected during 6-8 h and 24 h after drug administration, respectively. The mean plasma clearance (16.7 +/- 4.9 ml/min/kg), steady-state volume of distribution (1.5 +/- 0.4 L/kg), and terminal plasma half-life (96.8 +/- 7.5 min) did not differ significantly between the two i.v. doses. DDI was eliminated from the body primarily by excretion of the unchanged drug in the urine (74%). The absorption of DDI from the subcutaneous site was complete (bioavailability of 0.91 +/- 0.13) and rapid, with peak plasma concentration obtained at 30 min.
authors.affiliation: Department of Pharmaceutics, University of Washington, Seattle 98195.
authors.forename: R J
authors.initials: RJ
authors.lastname: Ravasco
authors.forename: J D
authors.initials: JD
authors.lastname: Unadkat
authors.forename: C C
authors.initials: CC
authors.lastname: Tsai
authors.forename: C
authors.initials: C
authors.lastname: Nosbisch
mesh_terms: D000818:Animals; D016049:Didanosine / Q000008:administration & dosage / Q000097:blood / Q000493:pharmacokinetics*; D005260:Female; D007275:Injections, Intravenous; D007279:Injections, Subcutaneous; D008254:Macaca nemestrina; D008297:Male; D013997:Time Factors
chemical_list: D016049:Didanosine