Table 1.

Combination index (CI) values of DOX combined with RES in MCF7/ADR cells

DOX (μg/mL)+RES (μmol L−1)	Fa/%	CI
1 + 12.5	29.05	0.68
2 + 25	41.52	0.54
4 + 50	58.37	0.37
8 + 100	72.52	0.42
10 + 200	85.6	0.33

Fa represents as cellular proliferation inhibition rate.

The combination index (CI) defining the interaction between DOX and RES were analyzed by using CompuSyn software.