Chronic naltrexone differentially affects supraspinal delta-opioid receptor-mediated antinociception.
Kest B, Lee CE, Jenab S, Kao B, Inturrisi CE. Chronic naltrexone differentially affects supraspinal delta-opioid receptor-mediated antinociception. Eur J Pharmacol. 1998 Mar 12; 345(1):47-53.