Docusate Sodium is a laxative used to treat constipation, for constipation due to the use of opiates it maybe used with a stimulant laxative, can be taken by mouth or rectally.

[D-Ala2]-Leucine enkephalin is a delta opioid agonist used to study the signaling pathway of delta opioid receptors.

Norbinaltorphimine dihydrochloride is a selective and potent κ opioid receptor antagonist that induces itch-associated responses in mice.