Ivacaftor is a medication used to treat cystic fibrosis. During the manufacturing process, impurities may be present in the final product. These impurities can affect the efficacy and safety of the medication, which is why it is important to monitor and control their levels. Common impurities found in Ivacaftor include related compounds, degradation products, and residual solvents. Strict regulations and guidelines are in place to ensure the quality of Ivacaftor and its impurities are within acceptable limits.