title: Pharmacokinetics of d(+)-usnic acid in rabbits after intravenous administration.
abstract: The pharmacokinetics of usnic acid, a lichen antitubercular, antitumor and enzyme inhibiting agent, was studied in normal male rabbits after administration of 5 mg/kg dose by intravenous route. Plasma samples were collected up to 48 h. The plasma usnic acid levels showed a triexponential decay with a terminal half life of 10.69 h. The mean volume of distribution of the central compartment was 43.93 ml/kg. The pharmacokinetic parameters obtained from a three-compartment body model and a noncompartment body model gave close values. The mean steady-state volume of distribution was 167.17 and 163.29 ml/kg, systemic clearance was 12.17 and 12.25 ml/h/kg and AUC was 428.51 and 426.69 micrograms.ml/h following three-compartmental and noncompartmental analyses respectively.
authors.affiliation: University College of Pharmaceutical Sciences, Kakatiya University, Warangal, India.
authors.forename: D
authors.initials: D
authors.lastname: Venkataramana
authors.forename: D R
authors.initials: DR
authors.lastname: Krishna
mesh_terms: D000818:Animals; D001572:Benzofurans / Q000097:blood / Q000493:pharmacokinetics*; D001825:Body Fluid Compartments / Q000502:physiology; D004305:Dose-Response Relationship, Drug; D007275:Injections, Intravenous; D008297:Male; D011817:Rabbits
chemical_list: D001572:Benzofurans; C073339:usnic acid