title: [Pharmacokinetics of AR-L 115 BS in rabbits and dogs].
abstract: The pharmacokinetics of 2-[(2-methoxy-4-methylsulfinyl) phenyl]-1H-imidazo[4,5-b]pyridine (AR-L 115 BS) were investigated in the rabbit and the dog. The rabbits were dosed with 1 mg/kg 14C-AR-L 115 BS i.v. or p.o and the dogs with 1 mg/kg i.v. or 5 mg/kg p.o. following i.v. administration the blood levels in the two investigated species are described by a 3-exponential decline, during which the preponderant amount of radioactivity is eliminated in the first two phases. The half-lives are 0.25 h and 6 h in the rabbit and 0.2 h and 0.6 in the dog. Following oral administration the radioactivity is absorbed rapidly and quantitatively. Blood level peaks occur after 1 h p.a. amounting to 0.07--0.1 microgram Eq/ml in the rabbit (1 mg/kg) and 2.7 +/- 0.3 micrograms Eq/ml in the dog (5 mg/kg). The elimination behaviour is comparable to that after i.v. dosing. The plasma radioactivity in the dog is not protein bound. On average the urinary excretion amounts to 45% (i.v) and 40% (p.o.) in the rabbit, with a further 52% (both application routes) in the faeces up to 144 h p.a. In the dog the mean urinary excretion is 24% (i.v.) and 29% (p.o.). Faecal elimination is 63% (i.v.) and 56% (p.o.) up to 96 h p.a.
mesh_terms: D000284:Administration, Oral; D000818:Animals; D002316:Cardiotonic Agents / Q000378:metabolism*; D004285:Dogs; D007093:Imidazoles / Q000378:metabolism*; D007275:Injections, Intravenous; D007700:Kinetics; D008297:Male; D011485:Protein Binding; D011817:Rabbits; D013045:Species Specificity
chemical_list: D002316:Cardiotonic Agents; D007093:Imidazoles; C029758:sulmazole
vernacular_title: Pharmakokinetik von AR-L 115 BS bei Kaninchen und Hund.