Orphanin FQ inhibits capsaicin-induced thermal nociception in monkeys by activation of peripheral ORL1 receptors.
Ko MC, Naughton NN, Traynor JR, Song MS, Woods JH, Rice KC, McKnight AT. Orphanin FQ inhibits capsaicin-induced thermal nociception in monkeys by activation of peripheral ORL1 receptors. Br J Pharmacol. 2002 Feb; 135(4):943-50.