Conflicts of Interest The authors declare no conflicts of interest. References , , , and . 1977. “The Fate of Pridinol in the Organism: Pharmacokinetics and Distribution in Animals.” European Journal of Drug Metabolism and Pharmacokinetics 2, no. 3: 121–130. FEI Equine Prohibited Substances List. 2025. https://inside.fei.org/fei/cleansport/ad-h/prohibited-list. HISA Prohibited Substances List. 2025. https://bphisaweb.wpengine.com/wp-content/uploads/2023/12/HISA_BannedProhibitedList_Report_113023a.pdf.