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Multidose pharmacokinetics and safety of a modified, compounded theophylline product in dogs
Journal of Veterinary Pharmacology and Therapeutics ( IF 1.5 ) Pub Date : 2021-06-26 , DOI: 10.1111/jvp.12997
Jennifer M Reinhart 1 , Claudia Perkowski 1 , Courtney Lester 1 , Valeria Campos 1 , Saki Kadotani 1 , Zhong Li 2 , Brendan C McKiernan 1 , Ryan Fries 1
Affiliation  

Theophylline is used in canine medicine for the management of chronic bronchitis and bradyarrhythmias, yet no species-validated commercial products are available. This study reports the single-dose and multidose pharmacokinetics and safety of a modified, compounded theophylline (MCT) product readily available from a well-established, USP-compliant compounding pharmacy, which may be a suitable and reliable source for theophylline for dogs. Eleven dogs underwent serial plasma theophylline measurement following 10 mg/kg MCT PO. After a 7 days washout, dogs received 10 mg/kg MCT PO q12h and serial plasma theophylline quantification was repeated after the ninth dose. Dogs were monitored for potential adverse effects. For the nine dogs that completed the study, plasma theophylline concentrations were between 5 and 30 μg/ml for 91 +/− 15% of the dosing interval. There was no significant difference in half-life between single-dose and multidose administration. The most common adverse effects reported were mild and included agitation, excitement, and increased activity. The results of this study support the use of 10 mg/kg MCT administered twice daily as a starting dosage in dogs. This regimen appears safe, achieves appropriate plasma drug concentrations in most dogs, and does not cause significant changes in pharmacokinetic properties at steady state. Because compounded drugs do not undergo consistent testing for identity, quality, strength, purity, and stability, results of research described in reports using compounded products may not be reproducible.

中文翻译:

改良的复合茶碱产品在犬体内的多剂量药代动力学和安全性

茶碱在犬科药物中用于治疗慢性支气管炎和缓慢性心律失常,但尚无经过物种验证的商业产品。本研究报告了一种改良的复合茶碱 (MCT) 产品的单剂量和多剂量药代动力学和安全性,该产品可从完善的符合 USP 的复合药房轻松获得,这可能是犬用茶碱的合适且可靠的来源。11 只狗在 10 毫克/公斤 MCT PO 后进行了连续血浆茶碱测量。7 天清除后,狗接受 10 mg/kg MCT PO q12h,并在第九次给药后重复连续血浆茶碱定量。监测狗的潜在不良反应。对于完成研究的九只狗,在 91 +/- 15% 的给药间隔内,血浆茶碱浓度在 5 到 30 μg/ml 之间。单剂量和多剂量给药的半衰期没有显着差异。报告的最常见的不良反应是轻微的,包括激动、兴奋和活动增加。该研究的结果支持使用每天两次 10 mg/kg MCT 作为狗的起始剂量。该方案看起来是安全的,在大多数狗中达到适当的血浆药物浓度,并且不会导致稳态下的药代动力学特性发生显着变化。由于复合药物未经过一致的特性、质量、强度、纯度和稳定性测试,因此使用复合产品的报告中描述的研究结果可能无法重现。单剂量和多剂量给药的半衰期没有显着差异。报告的最常见的不良反应是轻微的,包括激动、兴奋和活动增加。该研究的结果支持使用每天两次 10 mg/kg MCT 作为狗的起始剂量。该方案看起来是安全的,在大多数狗中达到适当的血浆药物浓度,并且不会导致稳态下的药代动力学特性发生显着变化。由于复合药物未经过一致的特性、质量、强度、纯度和稳定性测试,因此使用复合产品的报告中描述的研究结果可能无法重现。单剂量和多剂量给药的半衰期没有显着差异。报告的最常见的不良反应是轻微的,包括激动、兴奋和活动增加。该研究的结果支持使用每天两次 10 mg/kg MCT 作为狗的起始剂量。该方案看起来是安全的,在大多数狗中达到适当的血浆药物浓度,并且不会导致稳态下的药代动力学特性发生显着变化。由于复合药物未经过一致的特性、质量、强度、纯度和稳定性测试,因此使用复合产品的报告中描述的研究结果可能无法重现。和增加的活动。该研究的结果支持使用每天两次 10 mg/kg MCT 作为狗的起始剂量。该方案看起来是安全的,在大多数狗中达到适当的血浆药物浓度,并且不会导致稳态下的药代动力学特性发生显着变化。由于复合药物未经过一致的特性、质量、强度、纯度和稳定性测试,因此使用复合产品的报告中描述的研究结果可能无法重现。和增加的活动。该研究的结果支持使用每天两次 10 mg/kg MCT 作为狗的起始剂量。该方案看起来是安全的,在大多数狗中达到适当的血浆药物浓度,并且不会导致稳态下的药代动力学特性发生显着变化。由于复合药物未经过一致的特性、质量、强度、纯度和稳定性测试,因此使用复合产品的报告中描述的研究结果可能无法重现。
更新日期:2021-06-26
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