Study of Lorlatinib In People With ALK-positive Non-small Cell Lung Cancer

The purpose of this clinical trial is to learn whether the study medicine (called lorlatinib) is safe and effective for the treatment of non-small cell lung cancer that is caused by an abnormal anaplastic lymphoma kinase (ALK) gene. This study is seeking participants whose lung cancer has progressed after receiving either alectinib or ceritinib as their first treatment. Participants will take part in this study for up to approximately 4 years, depending on when the study is completed and how their cancer responds to the study treatment. They will take lorlatinib orally (by mouth) once daily. Participants will visit the study site about every six weeks to meet with the study team. During these visits, the study team will monitor the safety and effects of lorlatinib.