Cisplatin resistance is a major concern in ovarian cancer treatment. The aim of this study was to investigate if wedelolactone could perform better in resistant ovarian cancer cells when used in combination with cisplatin. Growth inhibitory potential of wedelolactone and cisplatin was investigated through MTT reduction assay in ovarian cancer cell lines including A2780 (sensitive), A2780 Cisplatin and wedelolactone showed a dose-dependent growth inhibitory effect. RF value of wedelolactone was 1.1 in the case of A2780 These findings have shown that additive outcome of drug combination in A2780