Orkambi combines two medicines that act on the CFTR protein in different ways. Lumacaftor improves the processing and trafficking of the CFTR protein, which helps more of the protein reach the cell surface. Ivacaftor enhances CFTR channel opening and function, so the protein works better once it is there.
Together, these actions increase chloride transport across epithelial cells. This improves mucus hydration and clearance, which helps improve lung function and reduce disease progression.
For people with cystic fibrosis who have two copies of the F508del mutation, these effects support treatment goals such as better breathing and long-term disease management. Orkambi is not used on its own. Providers use it as part of routine CF care, with regular monitoring such as Liver Function Tests (LFTs), to track how you respond.