Therefore, we believe the introduction of a dual functionalized peptide in the Dox liposome formulation (SA-5 to bind to HER2 protein overexpressed in cancer and inhibit dimerization, Dox-encapsulated will act as anti-cancer agent) could enhance its therapeutic efficiency in the lung tumor model due to the synergistic effect of SA-5 and Dox. Here, ERBB2 is linked to cancer.