Petosemtamab (MCLA 158) is a highly potent monoclonal antibody against EGFR (Kd: 0.22 nM) and LGR5 (Kd: 0.86 nM). Petosemtamab promotes EGFR signaling disruption and receptor breakdown in LGR5+ cancer cells.

HKI-357 is an irreversible dual inhibitor of EGFR and ERBB2 (IC50s: 34 nM and 33 nM). HKI-357 suppresses EGFR autophosphorylation (at Y1068), and AKT and MAPK phosphorylation.

Lapatinib ditosylate is an anti-Y drug developed by GlaxoSmithKline (GSK) as a treatment for solid tumours such as breast and lung Y.