TY - JOUR N2 - The aim of the research was an examination of potential impact of milk yield on the intercompartmental clearance – distribution clearance as well as determination of the variability of obtained pharmacokinetic parameters by the population approach using a two-compartmental structural model. Blood perfusion has a considerable impact on physiology of the udder and kinetics of drugs that are distributed in this organ. The research was performed on healthy Holstein- Friesian and Polish Black-White cows at the age of 4-10 years. Determination of antibiotics (ampicillin, amoxicillin, cefoperazone, penicillin G prokaine, cloxacillin, cefacetril) concentration was carried out after their every intramammary administration to one quarter of the udder. A population pharmacokinetic model was created to fit milk concentration data. General milk yield of a single cow was used as a variable. A population analysis was conducted using non-linear mixed-effect modeling. The impact of milk productivity was set solely by reference to intercompartmental clearance only in case of penicillin G, cloxacillin and ampicillin. It, has been found that milk yield, depending on a drug, influenced the distribution clearance of the drug to varying degrees. It means indirectly that increased perfusion of the udder has a different impact on drug distribution from the udder to the bloodstream. L1 - http://www.journals.pan.pl/Content/106871/PDF/10.pdf L2 - http://www.journals.pan.pl/Content/106871 PY - 2018 IS - No 2 EP - 323 DO - 10.24425/122599 KW - intramammary KW - population KW - pharmacokinetics KW - antibiotic A1 - Grabowski, T. A1 - Burmańczuk, A. A1 - Wojciechowska, B. A1 - Kowalski, C. PB - Polish Academy of Sciences Committee of Veterinary Sciences PB - University of Warmia and Mazury in Olsztyn VL - vol. 21 DA - 2018.08.30 T1 - Impact of milk yield on pharmacokinetics of six intramammary drugs – a population approach SP - 317 UR - http://www.journals.pan.pl/dlibra/publication/edition/106871 T2 - Polish Journal of Veterinary Sciences ER -