Adverse event; Anaplastic lymphoma kinase; Non-small cell lung cancerEsdeveniment advers; Cinasa del limfoma anaplàsic; Càncer de pulmó de cèl·lules no petitesEvento adverso; Cinasa del linfoma anaplásico; Cáncer de pulmón de células no pequeñasLorlatinib is an oral treatment for patients with advanced ALK-positive non-small cell lung cancer (NSCLC). Its efficacy was demonstrated in the CROWN clinical study, in which data from 5 years of follow-up demonstrated effective long-term disease control in patients with advanced ALK-positive NSCLC. While lorlatinib has a distinct side effect profile, its side effects are generally manageable. Managing side effects successfully is critical to preserving patient quality of life and promoting adherence to treatment—both of which are key to maximizing the long-term benefits of lorlatinib. The CROWN study showed that lorlatinib-associated side effects can be managed with dose adjustments, such as lowering the daily dose, without sacrificing treatment effectiveness. This guide, developed collaboratively by patients living with advanced ALK-positive NSCLC and healthcare professionals experienced with managing lorlatinib treatment, aims to help patients understand what to expect from treatment and how to take an informed, active role in their care.Development of this report was funded by Pfizer