Supraspinal and spinal delta(2) opioid receptor-mediated antinociceptive synergy is mediated by spinal alpha(2) adrenoceptors.
Grabow TS, Hurley RW, Banfor PN, Hammond DL. Supraspinal and spinal delta(2) opioid receptor-mediated antinociceptive synergy is mediated by spinal alpha(2) adrenoceptors. Pain. 1999 Oct; 83(1):47-55.