Stability results of the studied drugs in spiked human plasma under different conditions.

	% Recoverya
	Concentration of the analyte (μg mL−1)	Three freeze–thaw cycles	Bench top stability	Auto-sampler, for 24 h
	2.00	86.48	92.27	99.13
	15.00	101.17	99.36	113.77
	28.00	97.44	99.82	112.00
Mean ±% RSD		95.03 ± 8.04	97.15 ± 4.35	108.30 ± 7.38

^aAverage of 5 determinations.