Lupeol acetate possesses antinociceptive, antifertility, and anti-inflammatory properties, the effect probably involves the opioid system, as indicated by the complete blockade of the opioid antagonist naloxone.

(R)-Monepantel ((R)-AAD1566) has potential anticancer activity but no nematicidal activity.

β-Endorphin, an endogenous opioid neuropeptide, is an opioid receptor agonist. β-Endorphin binds preferentially to μ-opioid receptors and is produced in certain neurons of the central and peripheral nervous system and is one of three endorphins produced in humans. β-Endorphin can be used to reduce stress and maintain homeostasis in the body and is involved in neurological pain perception regulation.