This medication is used to help relieve severe ongoing pain. Tramadol 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.

This medication is used to help relieve moderate to severe pain. Hydromorphone 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.

Nausea, vomiting, constipation, sweating, trouble sleeping, dry mouth, fatigue, lightheadedness, dizziness, drowsiness, or headache may occur. Some of these side effects may decrease after you have been using this medication for a while. If any of these effects last or get worse, tell your doctor or pharmacist promptly.

Nausea, vomiting, constipation, lightheadedness, dizziness, drowsiness, sweating, flushing, or dry mouth may occur. Some of these side effects may decrease after you have been using this medication for a while. If any of these effects last or get worse, tell your doctor or pharmacist promptly.

Take this medication on a regular schedule as directed by your doctor, usually once daily (every 24 hours). 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).

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).