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How to stop root canal pain
Take pain medication.
Your dentist may prescribe a pain reliever for you to take after the root canal. If not, or if the pain is only minimal, take an over-the-counter pain reliever like ibuprofen or acetaminophen according to the manufacturer's instructions.
Although you'll be given pain medication during the root canal, you should take the otc pain relievers within an hour after the root canal. This will give them a chance to start working before your anesthesia wears off.