{"title":"Plasma and Urine Pharmacokinetics of Intravenous Pridinol in Thoroughbreds for Its Medication Control.","authors":"Yohei Minamijima, Taisuke Kuroda, Atsushi Okano, Ai Wakuno, Reiko Yuasa, Yuhiro Ishikawa, Motoi Nomura, Kenji Kinoshita, Masayuki Yamada","doi":"10.1111/jvp.70029","DOIUrl":null,"url":null,"abstract":"<p><p>We examined the pharmacokinetics of intravenous pridinol in six thoroughbred horses. Each horse received a single 20 mg dose of pridinol mesylate via the jugular vein, and plasma and urine samples were collected over 72 h. Liquid chromatography-tandem mass spectrometry (LC-MS/MS) was used to quantify pridinol concentrations in plasma and urine, allowing for the calculation of pharmacokinetic parameters. A three-compartment model best fit the plasma elimination data. Using the Toutain model, irrelevant plasma and urine concentrations were estimated to be 0.00284 and 0.000612 ng/mL, respectively. Key pharmacokinetic parameters were clearance rate, 1.27 L/h/kg; steady-state volume of distribution, 2.07 L/kg; and steady-state urine-to-plasma ratio, 0.211. These findings can help establish regulatory thresholds for pridinol in horse racing and equestrian sports.</p>","PeriodicalId":17596,"journal":{"name":"Journal of veterinary pharmacology and therapeutics","volume":" ","pages":""},"PeriodicalIF":1.7000,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of veterinary pharmacology and therapeutics","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.1111/jvp.70029","RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PHARMACOLOGY & PHARMACY","Score":null,"Total":0}
引用次数: 0
Abstract
We examined the pharmacokinetics of intravenous pridinol in six thoroughbred horses. Each horse received a single 20 mg dose of pridinol mesylate via the jugular vein, and plasma and urine samples were collected over 72 h. Liquid chromatography-tandem mass spectrometry (LC-MS/MS) was used to quantify pridinol concentrations in plasma and urine, allowing for the calculation of pharmacokinetic parameters. A three-compartment model best fit the plasma elimination data. Using the Toutain model, irrelevant plasma and urine concentrations were estimated to be 0.00284 and 0.000612 ng/mL, respectively. Key pharmacokinetic parameters were clearance rate, 1.27 L/h/kg; steady-state volume of distribution, 2.07 L/kg; and steady-state urine-to-plasma ratio, 0.211. These findings can help establish regulatory thresholds for pridinol in horse racing and equestrian sports.
期刊介绍：
The Journal of Veterinary Pharmacology and Therapeutics (JVPT) is an international journal devoted to the publication of scientific papers in the basic and clinical aspects of veterinary pharmacology and toxicology, whether the study is in vitro, in vivo, ex vivo or in silico. The Journal is a forum for recent scientific information and developments in the discipline of veterinary pharmacology, including toxicology and therapeutics. Studies that are entirely in vitro will not be considered within the scope of JVPT unless the study has direct relevance to the use of the drug (including toxicants and feed additives) in veterinary species, or that it can be clearly demonstrated that a similar outcome would be expected in vivo. These studies should consider approved or widely used veterinary drugs and/or drugs with broad applicability to veterinary species.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
