Case Series: Cannabis Plant Extracts Effective in Mitigating Chronic Pain

London, United Kingdom: The use of sublingual oils containing whole-plant cannabis extracts are safe and effective in patients diagnosed with chronic pain, according to clinical outcome data published in the Journal of Clinical Pharmacology.

British researchers affiliated with London’s Imperial College assessed the use of cannabis extracts over a six-month period in 110 subjects. 

Investigators reported that the administration of cannabis oils was associated with “significant improvements” in patients’ pain conditions over the study period. Adverse events associated with the extracts were described as “being mild or moderate in intensity.”

They concluded: “Treatment of chronic pain with [whole-plant cannabis] oils was associated with an improvement in pain-specific outcomes, HRQoL [health-related quality of life] and self-reported sleep quality. Relative safety was demonstrated over medium-term prescribed use. Whilst these findings must be treated with caution considering the limitations of study design, they can inform future clinical trials.”

Several randomized, placebo-controlled trials have previously demonstrated the safety and efficacy in herbal cannabis in the treatment of chronic pain, particularly neuropathy. A 2017 review of over 10,000 peer-reviewed scientific papers by the National Academies of Sciences, Engineering, and Medicine acknowledged, “In adults with chronic pain, patients who [are] treated with cannabis or cannabinoids are more likely to experience a clinically significant reduction in pain symptoms. … There is conclusive or substantial evidence that cannabis is effective for the treatment of chronic pain in adults.”

Full text of the study, “Clinical outcome data of first cohort of chronic pain patients treated with cannabis-based sublingual oils in the United Kingdom – Analysis from the UK Medical Cannabis Registry,” appears in Journal of Clinical Pharmacology. Additional information on the use of cannabis among chronic pain patients is available from NORML.