Cancer occurs as a result of uncontrolled proliferation of cells. Although there are different types of cancer, gastric cancer is among the most common cancer types in the world. Many treatment approaches have been developed against gastric cancer. However, the treatment methods used today not only kill cancer cells but also damage healthy cells. Due to the disadvantages of the treatment methods used, herbal treatment approaches have started to be used. It is stated in the literature that Diindolylmethane (DIM) and indole-3-carbinol (I3C) molecules in Elettaria Cardamomum (E. Cardamomum) extract kill cancer cells by suppressing hormone pathways. In this study, the effect of E. Cardamomum and proleukin drug combinations on AGS, J774, THP-1 cell lines was investigated. As a result, it was determined that cardamom extract has a high cytotoxic effect on AGS gastric cancer cell line thanks to I3C and DIM molecules. It was determined that proleukin drug combined with cardamom extract had a higher rate of killing in AGS cells than the use of cardamom extract alone.