title: Naloxegol for the treatment of opioid-induced constipation.
abstract: With increasing chronic opioid use, opioid-induced constipation (OIC) is a rapidly increasing clinical challenge. Naloxegol, an orally administered, peripherally-acting, µ-opioid receptor antagonist, was developed for the treatment of OIC. This drug profile summarizes published information and presentations at meetings on the effects of naloxegol in OIC. In animal studies, naloxegol was able to inhibit gastrointestinal opioid effects while preserving central analgesic actions and human pharmacodynamic studies were in agreement with such mode of action. Phase II and Phase III studies in patients with non-cancer OIC confirmed the efficacy of naloxegol to inhibit OIC, and the most consistent efficacy was seen with the 25 mg dose once daily. There were no signs of opioid withdrawal in these studies. Side effects were mainly gastrointestinal in origin, and usually transient and mild. A long-term safety study showed no new adverse events. The US FDA and EMA are currently evaluating the use of naloxegol in OIC.
authors.affiliation: Department of Pathophysiology, Translational Research Center for Gastrointestinal Disorders (TARGID), University of Leuven, Herestraat 49, 0&N 1, bus 701, B-3000, Leuven, Belgium.
authors.forename: Jan
authors.initials: J
authors.lastname: Tack
authors.forename: Maura
authors.initials: M
authors.lastname: Corsetti
mesh_terms: D000701:Analgesics, Opioid / Q000009:adverse effects*; D000818:Animals; D003248:Constipation / Q000139:chemically induced* / Q000188:drug therapy*; D004195:Disease Models, Animal; D004305:Dose-Response Relationship, Drug; D006801:Humans; D009019:Morphinans / Q000627:therapeutic use*; D009292:Narcotic Antagonists / Q000627:therapeutic use*; D011092:Polyethylene Glycols / Q000627:therapeutic use*
chemical_list: D000701:Analgesics, Opioid; D009019:Morphinans; D009292:Narcotic Antagonists; D011092:Polyethylene Glycols; C000589308:naloxegol
keywords: naloxegol; opioid withdrawal; opioid-induced constipation; randomized controlled clinical trial