Involvement of NMDA-nitric oxide pathways in the development of tactile hypersensitivity evoked by the loose-ligation of inferior alveolar nerves in rats Brain Res 2003 Feb 14;963(1-2):232-43

Effective treatment of severe cancer pain of the head using low-dose ketamine in an opioid-tolerant patient

Ketamine in cancer pain: An update

Oral ketamine and transdermal nitroglycerin as analgesic adjuvants to oral morphine therapy for cancer pain management

Update on the neurophysiology of pain transmission and modulation: focus on the NMDA-receptor

Low dose ketamine as an analgesic adjuvant in difficult pain syndromes: a strategy for conversion from parenteral to oral ketamine

NMDA receptors as targets for drug action in neuropathic pain

Merz Memantine research

Dextromethorphan and memantine in painful diabetic neuropathy and postherpetic neuralgia: efficacy and dose-response trials

The NMDA (N-methyl-D-aspartate) receptor antagonist memantine in the treatment of postherpetic neuralgia: a double-blind, placebo-controlled study

Memantine (a N-methyl-D-aspartate receptor antagonist) in the treatment of neuropathic pain after amputation or surgery: a randomized, double-blinded, cross-over study

Three studies showing no benefit from memantine as a single agent in neuropathic pain relief

The use of NMDA-receptor antagonists in the treatment of chronic pain