The National Horseracing Authority is a signatory country of the Asian Racing Federation and has decided to adopt Asian Screening Limits (ASLs) for the substances indicated below, effective 1 September 2019. When the below ASL detection limits are exceeded in the laboratory screening process, qualitative confirmatory analysis will be followed to confirm the presence or absence of the prohibited substance.

• Firocoxib:          2 ng/mL in plasma
• Dantrolene:       0.1 ng/mL (of 5-hydroxydantrolene) in plasma
• Ketoprofen:       2 ng/mL in plasma
                             (under the condition of a single IV or oral dose)

The current, full list of adopted ASL’s and their definition is published under the Laboratory section (Asian Screening Limits) of the NHA website.