Springer Verlag, Psychopharmacology, 1(213), p. 53-60
DOI: 10.1007/s00213-010-2012-7
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The synthetic nonpeptide NOP (nociceptin/orphanin FQ peptide) receptor agonist Ro 64-6198 produces antinociception in rhesus monkeys. In rodents, it has much more variable effects on pain responses, but has response rate-increasing effects on punished operant behavior and decreases drug reward.