Source:http://linkedlifedata.com/resource/umls/id/C0205752
NCI: One of several substances made in the body that can relieve pain and give a feeling of well-being. Endorphins are peptides (small proteins) that bind to opioid receptors in the central nervous system. An endorphin is a type of neurotransmitter.,CSP: family of endogenous compounds, including peptides, which mimic the action of opiates on neurons, lymphocytes, and other cells; involved in pain suppression and other neurobehavioral phenomena; for opiate drugs use OPIATE ALKALOID.