To investigate the potential antitumoral properties and possible synergistic effect of a PAK inhibitor (IPA-3) combination with several compounds used in cancer treatment, such as EGFR inhibitors (osimertinib and afatinib), PKCι inhibitor (auranofin), MEK inhibitor (trametinib), and a Flk3/Syk, and potential multiple PKC inhibitor (midostaurin), several lung cancer cell lines possessing different molecular characteristics were tested, such as HCC827 (EGFR mutated), H23 (KRAS mutated) and H520 (PAK1 overexpression). The gene discussed is KRAS; the disease is lung carcinoma.