There is mounting real world evidence and numerous anecdotes about using CBD or cannabis-based medicine to support opioid withdrawal. A National Academy of Sciences report in 2017 concluded that there is evidence that cannabis is effective for the treatment of chronic pain in adults.
With no non-opioids to treat severe and chronic pain available, and likely not available for years, it seems an easy decision to give cannabis-based medicine a go. It is available. It is not lethal. And even if cannabis-based medicine works as an adjunct to opioids to manage severe and chronic pain, patients will need less opioids, there will be less overdoses and deaths and, there will be a decrease in cost to society. Finally, if we spend $100million to answer this research question, that is 0.13% of the cost for one year of the opioid epidemic in America (CDC says it cost $76.5B/year).