Orexin-A, an hypothalamic peptide with analgesic properties.
Bingham S, Davey PT, Babbs AJ, Irving EA, Sammons MJ, Wyles M, Jeffrey P, Cutler L, Riba I, Johns A, Porter RA, Upton N, Hunter AJ, Parsons AA.
Bingham S, et al.
Pain. 2001 May;92(1-2):81-90. doi: 10.1016/s0304-3959(00)00470-x.
Pain. 2001.
PMID: 11323129