NCIt definition : A synthetic trans-3,4-dimethyl-4-(3-hydroxyphenyl) piperidine with peripherally selective
opioid mu receptor antagonist activity. Alvimopan is a selective and competitive antagonist
at mu-opioid receptors, found in myenteric and submucosal neurons and the immune cells
of the lamina propria in the human gut. Upon administration, this agent binds to mu-opioid
receptors in the gut, thereby reversing opioid-related disturbances in gut motility.
Alvimopan is approximately three to nine times more potent than naloxone.;