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The analgesic effect of the N-methyl-D-aspartate (NMDA) receptor blocker ketamine in 17 patients (13 females and four males, age 32-88 years) who had suffered neuropathic orofacial pain for time periods ranging from 6 months to 28 years was examined. The patients were given an i.m. test-dose of 0.4 mg/kg ketamine combined with 0.05 mg/kg midazolam. Four(More)
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