HepG2 and A549 cells were treated with
P. emblica and T. bellerica extracts either alone or in
combination with doxorubicin or cisplatin and effects on
cell growth were determined using the sulforhodamine
B (SRB) assay. The isobologram and combination index
(CI) method of Chou-Talalay were used to evaluate
interactions between plant extracts and drugs.