1. Narcotic antagonists;AMA,1977
2. Selective blockage of delta opioid receptors prevents the development of morphine tolerance and dependence in mice;Abdelhamid;J. Pharmacol. Exp. Ther.,1991
3. Involvement of dynorphin A and not substance P in the spinal antianalgesic action of Capsaicin against morphine;Arts;J. Pharmacol. Exp. Ther.,1992
4. Endogenous pain control systems: Brainstem spinal pathways and endorphin circuitry;Basbaum;Annu. Rev. Neurosci.,1984
5. Naloxone, naltrexone, and related noroxymorphones;Blumberg,1974