Prezista and Relistor Tablets

• Generic Name: darunavir
• Dosage Forms: tablet, film coated; oral suspension
• Other Brand Names: Prezista

Prezista (darunavir) is a protease (PRO-tee-ayz) inhibitor antiviral medicine that prevents human immunodeficiency virus (HIV) from multiplying in your body.

Prezista is used to treat HIV, the virus that can cause acquired immunodeficiency syndrome (AIDS).

Prezista is not a cure for HIV or AIDS.

• Generic Name: methylnaltrexone
• Dosage Forms: tablet
• Other Brand Names: Relistor

Methylnaltrexone blocks the effects of opioid medication. An opioid is sometimes called a narcotic.

Methylnaltrexone 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.

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

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

Methylnaltrexone may also be used for purposes not listed in this medication guide.