Many Chronic Pain-Related Cannabis Studies Lack “High-Quality” Evidence

Cannabis-based medicines for chronic neuropathic pain in adults (Review)

In Summary:

In a recent Cochrane meta-analysis of studies investigating the use of medical cannabis for chronic neuropathic pain management, the authors determined that no results were what they could consider “high quality.” All data which related to degrees of pain relief, adverse events, and “Patient Global Impression of Change” were largely of very low or low quality, with some outcomes being of moderate quality. The meta-analysis concluded that no existing evidence backs up the use of cannabis for chronic neuropathic pain; however, the quality of evidence examined highlights the need for more controlled studies.  

Dr. Caplan and the #MDTake:

Depending on the system of organization one prefers, pain can be divided up into different subtypes. For one system, it’s three subtypes: neuropathic, nociceptive, and “other.” For another system, pain can be organized by timing (sharp, acute, chronic, breakthrough), location (bone, soft tissue, nerve, referred, phantom), or by the relative system (emotional, cancer, body.) This review discusses the subtype category of “neuropathic pain” as a means of grouping pain to study. The measures used to assess the pain are as subjective as the categories themselves. Clearly, compounding the two subjective divisions is unlikely to produce “high quality” data, but it is a misleading interpretation to take away that there is no good quality information to glean from the observations this review organizes, and also a misinterpretation to jump to an idea that cannabis is not helpful. Rather, given the statistical tools we currently use, and the subjective systems of understanding pain are not well-matched to translating the effects of cannabis on pain into this type of data.

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Benjamin Caplan, MDMany Chronic Pain-Related Cannabis Studies Lack “High-Quality” Evidence

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