The study consists of an open-label, safety run-in to confirm the safety of Itacitinibin combination with erlotinib in subjects with nonsquamous non-small cell lung cancer (NSCLC) that is Stage IIIB, Stage IV, or recurrent whose tumors have EGFR activating mutations. Subjects in the safety run-in will receive open-label Itacitinib and erlotinib.~In the second part of the study, subjects will be enrolled and randomized to receive erlotinib (open-label) and either Itacitinib or placebo in a blinded manner. The dose of Itacitinib administered will be determined from the data produced in the safety run-in phase.~Treatment will consist of repeating 21-day cycles. Subjects will take erlotinib tablets daily and Itacitinib/placebo will be self-administered daily during the entire cycle.
The purpose of this study is to determine if Itacitinib in combination with erlotinib is safe and effective in the treatment of nonsquamous non-small cell lung cancer (NSCLC) that is Stage IIIB/Stage IV or recurrent whose tumors have EGFR activating mutations.