Pembrolizumab and Afatinib in Patients With Non-small Cell Lung Cancer With Resistance to Erlotinib

This phase I/Ib trial studies the side effects and best dose of pembrolizumab when given together with afatinib dimaleate in treating patients with non-small cell lung cancer that has spread to other places in the body and usually cannot be cured or controlled with treatment, or has come back and does not respond to erlotinib hydrochloride. Monoclonal antibodies, such as pembrolizumab, may interfere with the ability of tumor cells to grow and spread. Afatinib dimaleate may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Giving pembrolizumab and afatinib dimaleate together may be an effective treatment for non-small cell lung cancer.