Assertion: citrate's fentanyl | /r/HasProperty | an opioid agonist
Facets:
Source sentences:
text: Oral transmucosal fentanyl citrate lozenge is a solid formulation of fentanyl, an opioid agonist, intended for oral transmucosal administration.
text: Fentanyl is an opioid agonist whose principal therapeutic action is analgesia.