Baumrucker SJ: Clinical research on heroin in cancer pain control. American Journal of Hospice & Palliative Care. January/February 2000; 17(1): 8-9.
2.
Hewitt, DJ: The use of NMDA-receptor antagonists in the treatment of chronic pain. Clin J Pain. 2000; 16 (2 Suppl): S73-S79.
3.
Wiesenfeld-Hallin Z: Combined opioid-NMDA antagonist therapies: What advantages do they offer for the control of pain syndromes?Drugs. January 1998; 55(1): 1-4.
4.
Belozertseva IV, et al.: Effects of short-acting NMDA receptor antagonist MRZ 2/576 on morphine tolerance development in mice. Naunyn Schmiedebergs Arch Pharmacol. 2000; 361(6): 573-577.
Klepstad P, Borchgrevink PC: Four years treatment with ketamine and a trial of dextromethorphan in a patient with severe post-herpetic neuralgia. Acta Anaesthesiol Scand. 1997; 41(3): 422-426.
7.
Berman RM, et al.: Antidepressant effects of ketamine in depressed patients. Biol Psychiatry. 2000; 47(4): 351-354.
8.
Rabben T, et al.: Prolonged analgesic effect of ketamine, an N-methyl-D-aspartate receptor inhibitor, in patients with chronic pain. J Pharmacol Exp Ther. 1999; 289(2): 1060-1066.
9.
Bell RF: Low dose subcutaneous ketamine infusion and morphine tolerance. Pain. 1999; 83(1): 101-103.