Products Methylnaltrexone is commercially available as a solution for injection (Relistor). It has been approved in many countries since 2009. Structure and properties Methylnaltrexone (C21H26NO4, Mr = 356.4 g/mol) is an -methylated naltrexone. It is present in drugs as methylnaltrexone bromide. Effects Methylnaltrexone (ATC A06AH01) counteracts constipation caused by opioids. The effects are due to … Methylnaltrexone
Physiological background Itch results from activation of specialized afferent unmyelinated C fibers in the skin. These fibers are anatomically identical to those that conduct pain but differ in function and stimulus transmission to the brain. They contain a number of receptors such as histamine receptors, PAR-2, endothelin receptor, and TRPV1, and mediators such as histamine, … Itch
Symptoms Drug therapy with opioids for pain, cough, or diarrhea often results in constipation as an adverse effect. Triggers include, for example, morphine, codeine, oxycodone, tramadol, fentanyl, or buprenorphine. Constipation limits quality of life and can lead to accompanying symptoms and complications such as nausea, vomiting, bloating, abdominal cramps, hemorrhoids, and bowel obstruction. Laxative abuse … Opioids and Constipation
Products Naltrexone is commercially available in the form of film-coated tablets (naltrexin). It has been approved in many countries since 2003. Structure and properties Naltrexone (C20H23NO4, Mr = 341.40 g/mol) is a synthetically produced opioid related to oxymorphone. It is present in drugs as naltrexone hydrochloride, a white, hygroscopic powder that is readily soluble in … Naltrexone
