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. 2019 Jul 3;33(9):2298–2309. doi: 10.1002/ptr.6392

Table 1.

Summary of CI value and the concentration of separate drugs in combination at 50% Fa

Drug combination Fa = 0.5
A549 PC9 H1299 SPA‐A1
DDP + Tan IIA
CI 0.78348 0.75867 0.73588 0.64470
DDP (μM) 0.20769 0.20249 0.16046 0.14853
Tan IIA (μM) 4.15388 4.04975 3.20926 2.97054

Abbreviations: CI, combination index; DDP, cisplatin; Fa, fraction affected; Tan IIA, Tanshinone IIA.