Alunbrig (pronounced AL-uhn-brig) is a prescription medication used to treat non-small cell lung cancer (NSCLC) that is positive for the ALK (anaplastic lymphoma kinase) gene mutation. It works as a targeted therapy, blocking the abnormal ALK protein to slow or stop cancer cell growth. Taken orally, Alunbrig may cause side effects such as nausea, fatigue, cough, or high blood pressure. Treatment should be closely monitored by a healthcare provider to ensure safety and effectiveness.