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Press Release

UEG Week: Cannabis significantly improves the symptoms of Crohn’s disease despite having no effect on gut inflammation

October 23, 2018
UEG Week
UEG Week

In the first study of its kind, cannabis oil has been shown to significantly improve the symptoms of Crohn’s disease and the quality of life of sufferers but, contrary to previous medical thinking, has no effect on gut inflammation.

In a randomised, placebo-controlled study, researchers from Israel have shown that cannabis can produce clinical remission in up to 65% of individuals after 8 weeks of treatment, but that this improvement does not appear to result from a dampening down of the underlying inflammatory process.

Speaking at UEG Week 2018 in Vienna, lead researcher, Dr Timna Naftali explained, “Cannabis has been used for centuries to treat a wide range of medical conditions, and studies have shown that many people with Crohn’s disease use cannabis regularly to relieve their symptoms.It has always been thought that this improvement was related to a reduction in inflammation in the gut and the aim of this study was to  investigate this.” 

The Israeli team recruited 46 people with moderately severe Crohn’s disease, and randomized them to receive 8 weeks of treatment with either cannabis oil containing 15% cannabidiol and 4% tetrahydrocannabinol or placebo. Symptom severity and quality of life were measured before, during, and after treatment using validated research instruments. Inflammation in the gut was assessed endoscopically and by measuring inflammatory markers in blood and stool samples. 

After 8 weeks of treatment, the group receiving the cannabis oil had a significant reduction in their Crohn’s disease symptoms compared with the placebo group, and 65%met strict criteria for clinical remission (versus 35% of the placebo recipients). The cannabis group also had significant improvements in their quality of life compared with the placebo group.

“We have previously demonstrated that cannabis can produce measurable improvements in Crohn’s disease symptoms4 but, to our surprise, we saw no statistically significant improvements in endoscopic scores or in the inflammatory markers we measured in the cannabis oil group compared with the placebo group,” said Dr Naftali. “We know that cannabinoids can have profound anti-inflammatory effects but this study indicates that the improvement in symptoms may not be related to these anti-inflammatory properties.”

Looking ahead, the research group plans to explore further the potential anti-inflammatory properties of cannabis in the treatment of inflammatory bowel disease. “There are very good grounds to believe that the endocannabinoid system is a potential therapeutic target in Crohn’s disease and other gastrointestinal diseases,” said Dr Naftali. “For now, however, we can only consider medicinal cannabis as an alternative or additional intervention that provides temporary symptom relief for some people with Crohn’s disease.’

Social Sharing
  • About UEG
  • About UEG Week
  • Notes to Editors
  • References
About UEG

UEG, or United European Gastroenterology, is a professional non-profit organisation combining all the leading European medical specialist and national societies focusing on digestive health.

Our member societies represent more than 30,000 specialists from every field of gastroenterology. Together, we provide services for all healthcare professionals and researchers, in the broad area of digestive health. The role of UEG is to take concerted efforts to learn more about digestive disease by prevention, research, diagnosis, cure and raising awareness of their importance. 

To advance the standards of gastroenterological care and knowledge across the world and to reduce the burden of digestive diseases, UEG offers numerous activities and initiatives, including:

  • UEG Week: Organising the best international multidisciplinary gastroenterology congress in the world
  • UEG Research: Supporting cooperation and excellence in digestive health research
  • UEG Journal: Delivering clinical information for digestive health with authority
  • UEG Education: Providing learning oportunities in multiple formats
  • Quality of Care: Improving clinical practice to reduce health inequalities across Europe
  • Public Affairs: Acting as the united voice of European Gastroenterology towards the public and policy makers

Find out more about UEG’s work by visiting www.ueg.eu or contact:    

Luke Paskins on +44 (0)1444 811099 or  

About UEG Week

UEG Week is the largest and most prestigious gastroenterology meeting in Europe and has developed into a global congress. It attracts over 14,000 participants each year, from more than 120 countries, and numbers are steadily rising.

UEG Week provides a forum for basic and clinical scientists from across the globe to present their latest research in digestive and liver diseases, and also features a two-day postgraduate course that brings together top lecturers in their fields for a weekend of interactive learning.

Notes to Editors

For further information, or to arrange an interview with Dr Tinma Naftali, please contact Luke Paskins on +44 (0)1444 811099 or

About Dr Timna Naftali

Dr Timna Naftali is an MD Specialist in Gastroenterology at Meir Hospital and Kupat Holim Clinic, Tel Aviv University, Israel.

References
  1. Naftali T, Bar-Lev Schlieder L, Konikoff F, et al. Cannabis induces clinical response but no endoscopic response in Crohn’s disease patients. Presented at UEG Week Vienna 2018, October 22, 2018. 
  2. Lal S, Prasad N, Ryan M, et al. Cannabis use amongst patients with inflammatory bowel disease. Eur J Gastroenterol Hepatol. 2011;23(10):891-6.
  3. Weiss A, Friedenberg F. Patterns of cannabis use in patients with Inflammatory Bowel Disease: A population based analysis. Drug Alcohol Depend. 2015;156:84-89.
  4. Naftali T, Bar-Lev Schleider L, Dotan I, et al. Cannabis induces a clinical response in patients with Crohn's disease: a prospective placebo-controlled study. Clin Gastroenterol Hepatol. 2013;11(10):1276-1280.e1.

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