 <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]  or after surgery). It belongs to a class of drugs known as opioid analgesics. It works in the brain to change how your body feels and responds to pain. How to use tapentadol oral Read the Medication Guide provided by your pharmacist before you start taking tapentadol and each time you get a refill. If you have any questions, ask your doctor or pharmacist. Take this medication by mouth as directed by your doctor. You may take this drug with or without food. If you have nausea, it may help to take this drug with food. Ask your doctor or pharmacist about other ways to decrease nausea (such as lying down for 1 to 2 hours with as little head movement as possible). The dosage is based on your medical condition and response to treatment. Do not increase your dose or use this drug more often or for longer than prescribed. Properly stop the medication when so directed. Pain medications work best if they are used as the first signs of pain occur. If you wait until the pain has worsened, the medication may not work as well. Suddenly stopping this medication may cause withdrawal, especially if you have used it for a long time or in high doses. To prevent withdrawal, your doctor may lower your dose slowly. Tell your doctor </s>