Table 1.

IC₅₀ of phenytoin and doxorubicin in K562 and K562/Dox cells.

Drug	K562 IC50 (μg·mL−1)	K562/Dox IC50 (μg·mL−1)			RI of SB202190 group	RI of verapamil group
		Control	SB202190	Verapamil
Phenytoin	468.82±44.67	2186.33±214.70	949.83±131.31	852.83±105.44	2.30	2.56
Doxorubicin	0.32±0.05	4.33±0.50	0.40±0.09	0.35±0.05	10.83	12.37

Data represented as mean ±SD (n=12).