The QAP administered by the CPMA has evolved over the past 17 years in conjunction with the agency’s equine drug research program. This program consists of site inspections, reports, and a check sample program. Participating laboratories also maintain internal quality control systems and are accredited for this scope of testing. The check sample program monitors routine screening and target testing of urine and blood for drugs using thin-layer chromatography or instrumental methods. The process uses samples obtained after administration of drugs to horses. The program monitors common drugs in equine veterinary practice and of interest in horse racing. The QAP provides a useful measure of laboratory performance for the Canadian racing industry. The CPMA recently implemented a proficiency test as part of the CPMA’s partnership with the Standards Council of Canada to accredit racing laboratories. Each sample consists of 10 qualitative analysis samples of lyophilized, spiked equine urine, plus 2 quantitative analysis samples of frozen, spiked equine serum or urine. The participating laboratories have successfully completed five cycles of proficiency testing. The report concludes that laboratories operating in other jurisdictions could apply this program or one based on this model. Tables and 18 references (Author abstract modified)