Table 2.

CI ^b and DRI ^c values determined for various combinations of Quercetin and 5-fluorouracil. CI >1 Antagonism; CI=1 Additive; CI <1 Synergistic effect between drugs

5-FU (µM)	Quer (µM)	CI
1.5	50	0.45
6.25	50	0.53
25	50	0.33
1.5	200	0.74
6.25	200	0.7
25	200	0.47

^b Combination index; ^c Dose-reduction index