Afatinib (BIBW2992) is an irreversible EGFR/Neu inhibitor with an IC50 of 14 nM. Afatinib is a potent inhibitor of EGFR phosphorylation. Afatinib showed positive results in assays against a variety of human cancer cell lines, including A431, murine NIH-3T3 cells, and breast cancer cell line BT-474.An irreversible and potent EGFR/Neu inhibitor, inhibits EGFR phosphorylation Afatinib (BIBW2992) is an irreversible EGFR/Neu inhibitor with an IC50 of 14 nM. Afatinib is a potent inhibitor of EGFR phosphorylation. Afatinib showed positive results in assays against a variety of human cancer cell lines, including A431, murine NIH-3T3 cells, and breast cancer cell line BT-474. An irreversible and potent EGFR/Neu inhibitor, inhibits EGFR phosphorylation