Acetaminophen, caffeine, and magnesium salicylate and Relistor

• Generic Name: acetaminophen / caffeine / magnesium salicylate
• Dosage Forms: n.a.
• Other Brand Names: KneeRelief

Acetaminophen is a pain reliever and a fever reducer.

Caffeine is used in this product to increase the pain relieving effects of acetaminophen.

Magnesium salicylate is used to reduce pain, inflammation, and fever.

Acetaminophen, caffeine, and magnesium salicylate is a combination medicine used to treat pain and swelling from conditions such as muscle aches, arthritis, and joint soreness.

Acetaminophen, caffeine, and magnesium salicylate may also be used for purposes not listed in this medication guide.

• Generic Name: methylnaltrexone
• Dosage Forms: tablets: injection, solution
• Other Brand Names: Relistor

Relistor (methylnaltrexone) blocks the effects of opioid medication. An opioid is sometimes called a narcotic.

Relistor reduces constipation caused by using narcotic medicine for 4 weeks or longer. Methylnaltrexone works by preventing constipation without reducing the pain-relieving effects of the narcotic.

Relistor is given to adults who use narcotic medicine to treat severe chronic pain that is not caused by cancer.

Relistor injection is also for use in adults who have advanced illness and are receiving palliative care (treatment to relieve suffering and improve quality of life during a serious illness).

This medicine is usually given after laxatives have been tried without successful treatment of constipation.