Pharmacokinetics of florfenicol and its metabolite, florfenicol amine, in the Korean catfish (Silurus asotus).
The pharmacokinetics of florfenicol and its metabolite, florfenicol amine, was investigated after its intravenous (i.v.) and oral (p.o.) administration of 20 mg/kg of body weight in Korean catfish (Silurus asotus). After i.v. florfenicol injection (as a bolus), the terminal half-life (t(1/2)), the volume of distribution at steady state (V(dss)), and total body clearance were 11.12 +/- 1.06 h, 1.09 +/- 0.09 L/kg and 0.07 +/- 0.01 L x kg/h respectively. After p.o. administration of florfenicol, the t(1/2), C(max), t(max) and oral bioavailability (F) were 15.69 +/- 2.59 h, 9.59 +/- 0.36 microg/mL, 8 h and 92.61 +/- 10.1% respectively. Florfenicol amine, an active metabolite of florfenicol, was detected in all fish. After i.v. and p.o. administration of florfenicol, the observed C(max) values of florfenicol amine (3.91 +/- 0.69 and 3.57 +/- 0.65 mg/L) were reached at 0.5 and 7.33 +/- 1.15 h. The mean metabolic rate of florfenicol amine after i.v. and p.o. administration was 0.4 and 0.5 respectively.
Park
B-K
BK
Division of Veterinary Pharmacology and Toxicology, College of Veterinary Medicine, Chungnam National University, Daejeon, Republic of Korea.
Lim
J-H
JH
Kim
M-S
MS
Yun
H-I
HI
D000284:Administration, Oral; D000818:Animals; D000900:Anti-Bacterial Agents / Q000008:administration & dosage / Q000378:metabolism / Q000493:pharmacokinetics*; D019540:Area Under Curve; D002397:Catfishes; D006207:Half-Life; D007275:Injections, Intravenous; D013839:Thiamphenicol / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000378:metabolism / Q000493:pharmacokinetics; D014018:Tissue Distribution
D000900:Anti-Bacterial Agents; C083312:florfenicol amine; C035534:florfenicol; D013839:Thiamphenicol