Comparative pharmacokinetics and bioavailability of oxolinic acid and oxytetracycline in rainbow trout (Oncorhynchus mykiss).
1. The pharmacokinetics and bioavailability of oxolinic acid and oxytetracycline were studied in rainbow trout at a water temperature of 16 degrees C after intravascular (10 and 20 mg/kg, respectively) and oral (75 mg/kg) dosing. 2. The pharmacokinetics were best described by a two-compartment open model giving distribution half-lives of 0.31 h and 1.53 h, and elimination half-lives of 69.7 h and 60.3 h for oxolinic acid and oxytetracycline, respectively. The respective volumes of distribution (Vdarea) were 1.94 l/kg and 1.34 l/kg. 3. The apparent oral bioavailability for oxolinic acid and oxytetracycline was 13.6% and 5.6%. 4. The plasma protein binding was 27% for oxolinic acid and 55% for oxytetracycline. 5. Both drugs were well tolerated, the acute oral toxicities (LD50) exceeding 4000 mg/kg.
Björklund
H V
HV
Institute of Parasitology, Abo Akademi University, Finland.
Bylund
G
G
D000818:Animals; D001682:Biological Availability; D001798:Blood Proteins / Q000378:metabolism; D006207:Half-Life; D008433:Mathematics; D008954:Models, Biological; D010093:Oxolinic Acid / Q000493:pharmacokinetics*; D010118:Oxytetracycline / Q000493:pharmacokinetics*; D011485:Protein Binding; D014337:Trout / Q000378:metabolism*
D001798:Blood Proteins; D010093:Oxolinic Acid; D010118:Oxytetracycline