Based on the results of canine whole blood assays, plasma concentrations producing 20% COX-1 inhibition and 80% COX-2 inhibition were 2.46 µg/ mL and 1.28 µg/ mL, respectively, so that the IC20COX-1: IC80COX-2 potency ratio is approximately 2:1, whilst the IC80COX-1: IC80COX-2 potency ratio is approximately 40:1.