 <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] . If you have been instructed by your doctor to take more than 40 milligrams of simvastatin, continue on that same dose. However, promptly talk with him or her about the risks and benefits of your higher dose. Do not increase your dose or take this medication more often than prescribed. Your condition will not improve any faster, and the risk of serious side effects may be increased. Avoid eating grapefruit or drinking grapefruit juice while using this medication unless your doctor or pharmacist says you may do so safely. Grapefruit can increase the chance of side effects with this medicine. Ask your doctor or pharmacist for more details. If you also take certain other drugs to lower your cholesterol (bile acid-binding resins such as cholestyramine or colestipol), take this product at least 2 hours before or at least 4 hours after taking these medications. These medications can react with this product, preventing its full absorption. Take this medication regularly in order to get the most benefit from it. Remember to take it at the same time each day. Keep taking this medication even if you feel well. Most people with high cholesterol or triglycerides do not feel sick. It is very important to continue to follow your doctor's advice about diet and exercise </s>