 <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]  7 days). It is very important to continue to follow your doctor's advice about diet and exercise.The side effects of Niacin Oral: Flushing of the face and neck along with warmth, headache, itching, burning, sweating, chills, or tingling may occur within 2-4 hours of taking this medication. Flushing may last for a few hours after use. These effects should improve or go away as your body adjusts to the medication. Dizziness, stomach upset, heartburn, nausea, vomiting, and diarrhea may also occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly. To reduce the risk of dizziness and lightheadedness, get up slowly when rising from a sitting or lying position. This is very important if you are also taking medications to lower your blood pressure. Remember that this medication has been prescribed because your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Tell your doctor right away if you have any serious side effects, including: nausea/vomiting that doesn't stop, fast/irregular heartbeat, severe headache (migraine), unusual joint pain, swelling of legs/ </s>