Today the Association of Ringside Physicians published a position statement on the use of cannabis in combat sports. (disclosure, I co-authored the paper contributing to the section discussion regulatory issues surrounding cannabis).
In short the ringside doctors note that medical literature supports more potential harm from short term and long term cannabis use than benefits. They also note the artificial nature of positive drug testing which can detect metabolites for up to two months after discontinued use which can bear no relationship to actual impairment which is the harm sought to be avoided.
The full position statement can be found on the ARP’s website.
Combat Sports Law 