PubMed · 5191424
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1969. [Haloperidol].. https://pubmed.ncbi.nlm.nih.gov/5191424/
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Neuropathic pain, originating in damaged nerve and not peripheral nociceptors, is often resistant to treatment by opiates given by the oral, parenteral or spinal routes. This failure to obtain satisfactory pain relief is generally ascribed to psychological factors or to individual peculiarities in drug metabolism or kinetics. Currently, psychotropic and antidepressant drugs are among the first choices in treating painful conditions due to partial nerve lesions. We present a 56-year-old man who suffered intractable pain confined to his left knee following emergency L2-3 vertebral decompression, after collapse due to metastatic disease. 12 mg of morphine and 10 of diazepam given together intravenously did not lessen pain. Acute, solitary spinal nerve root injury was hypothesized. 2 mg of haloperidol injected IV gave complete relief of pain without hypotension or deep sedation. There is no definite explanation for the resistance of neuropathic pain to opiates.
This is a review of reserpine, haloperidol, and various phenothiazines that produce parkinsonism and other movement disorders. The by-products of illicit meperidine synthesis, MPTP and its more sinister companion, MPP, are also discussed. Movement disorders, transient or fixed, frank parkinsonism and/or dyskinesia, due to a variety of other medications and toxic agents are included. These are methanol, lithium, methyldopa, antimetabolites, antidepressants, sympathomimetic anorexiants, some types of antihistamines, and various combinations of agricultural chemicals.
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