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Neuropathic pain: evidence matters
1Pain Research, Nuffield Department of Anaesthetics, University of Oxford, Oxford Radcliffe Hospital, The Churchill, Headington, Oxford OX3 7LJ, UK. henry.mcquay@pru.ox.ac.uk
Abstract:
"He slept less and less; they gave him opium and began to inject morphine. But this did not relieve him. The dull pain he experienced in the half asleep condition at first only relieved him as a change, but then it became as bad, or even more agonizing, than the open pain."--Tolstoy, The Death of Ivan Ilyitch. It comes as a surprise to many pharmacologists that not all pains are relieved by opioids. Those who work in chronic pain are unfortunately only too aware of the problems that such pains can cause. One of the hallmarks of neuropathic pain is poor or incomplete relief with opioids. As with so many things in medicine, there is nothing novel in this realization, as the Tolstoy quotation shows.
Insights
Opioid medications do not effectively relieve all types of pain, particularly neuropathic pain. This limitation in pain management necessitates exploring alternative therapeutic strategies for chronic pain conditions.
Area of Science:
- Pharmacology
- Neurology
- Pain Medicine
Background:
- Opioids are commonly prescribed for pain relief, but their efficacy is limited in certain pain conditions.
- Neuropathic pain, characterized by nerve damage, often shows poor response to opioid analgesics.
- Historical accounts, like Tolstoy's, suggest the ineffectiveness of opioids for specific pain types.
Purpose of the Study:
- To investigate the limited efficacy of opioids in managing specific pain types.
- To highlight the challenges associated with opioid treatment for neuropathic pain.
- To underscore the need for alternative pain management approaches.
Main Methods:
- Review of existing pharmacological data on opioid efficacy.
- Analysis of clinical observations in chronic pain management.
- Literature review incorporating historical medical and literary references.
Main Results:
- Opioids provide incomplete or no relief for a significant subset of pain conditions.
- Neuropathic pain is a primary example where opioid treatment is often inadequate.
- The limitations of opioid analgesia have been recognized for a considerable time.
Conclusions:
- Not all pain conditions are responsive to opioid therapy.
- Effective management of neuropathic pain requires exploring non-opioid treatment options.
- Further research into novel analgesics and pain mechanisms is crucial.