Dermorphin is a peptide expressed by the frog venom skin glands with a potent opiate-like activity on mu-type opioid receptors, which have potent depressive and analgesic effects. Dermorphin may also have effects on pulmonary ventilation and pituitary hormone release. Dermorphin is 30-40 times more potent than morphine, however it has never been approved for medical use in humans or animals.H-Tyr-D-Ala-Phe-Gly-Tyr-Pro-Ser-NH2 or H-YaFGYPS-NH2