 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  To Use section. Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval. Some products that may interact with this drug include: "blood thinners" (such as warfarin), cyclosporine, danazol, daptomycin, gemfibrozil. Other medications can affect the removal of simvastatin from your body, which may affect how simvastatin works. Examples include certain azole antifungals (such as itraconazole, ketoconazole, posaconazole, voriconazole), cobicistat, colchicine, macrolide antibiotics (such as clarithromycin, erythromycin), nefazodone, HIV protease inhibitors (such as nelfinavir), ritonavir, telithromycin, among others. Chinese people should not take niacin at doses used to lower cholesterol </s>