Cannabis: are there any benefits?

Internal Medicine Journal
Alistair W Vickery, Phillip M Finch

Abstract

Cannabis has been used as a medicine for millennia. Prohibition in the mid-20th century precluded early scientific investigation. 'Cannabis' describes three separate forms - herbal cannabis, 'hemp' products, pharmaceutical-grade regulated cannabinoid-based medical products (CBMP). In Australia, CBMP became available for prescription in November 2016. Herbal cannabis with Δ9-tetrahydrocannabinol (THC), which is illegal, and cannabidiol (CBD) in herbal extracts, are both unregulated and unreliable sources of cannabinoids. The endocannabinoid system (ECS), delineated in the late 1990s, has increased the understanding and interest in research for appropriate clinical indications. The ubiquitous ECS has homeostatic and anti-inflammatory effects and comprises cannabinoid receptors, endocannabinoids and degrading enzymes. Phytocannabinoids are partial agonists of the ECS. In pre-clinical studies, THC and CBD produce beneficial effects in chronic pain, anxiety, sleep and inflammation. Systematic reviews often conflate herbal cannabis and CBMP, confusing the evidence. Currently large randomised controlled trials are unlikely to be achieved. Other methodologies with quality end-points are required. Rich, valuable high-quality real-world ...Continue Reading

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