Table 3.

Precision and Accuracy of Parecoxib and Valdecoxib in Beagle Plasma (n=6, Mean ± SD)

Compounds	Spiked (ng/mL)	Intra-Day		Inter-Day
		RSD (%)	RE (%)	RSD (%)	RE (%)
Parecoxib	10	3.65	−1.38	5.91	−0.33
	800	2.81	−0.57	3.85	0.45
	3000	1.67	−0.76	2.28	−0.54
Valdecoxib	10	3.22	−0.51	4.71	−0.49
	800	2.39	1.96	3.91	−0.43
	3000	1.36	−0.68	2.41	−0.25