Displaying 9 results of Saquinavir Impurities Saquinavir is a medication used to treat HIV/AIDS. However, impurities may be present in the drug that can affect its quality and effectiveness. These impurities can include unknown substances, degradation products, and residual solvents. It is important for pharmaceutical companies to closely monitor and control the levels of saquinavir impurities to ensure the safety and efficacy of the drug.