It is indicated for the first-line treatment of patients with metastatic non-small cell lung cancer (NSCLC) carrying EGFR exon 19 deletions or exon 21 (L858R) mutations.
In September 2018, dacomitinib received its first global approval, in the USA, for use in the first-line treatment of patients with metastatic NSCLC with EGFR exon 19 deletion or exon 21 L858R substitution mutations as detected by an FDA-approved test.