By Pat Anson, PNN Editor
Columbia University has been awarded a grant from the National Institute on Drug Abuse (NIDA) to investigate whether medical cannabis can reduce the use of opioids and overdose risk in chronic pain patients.
The grant was awarded after researchers with Columbia Care completed a small pilot study that found nearly two-thirds of patients with chronic nerve pain were able to reduce or stop their opioid use. Columbia Care is a private medical marijuana company not affiliated with the university that operates a chain of cannabis dispensaries around the country.
“There is an urgent need to investigate the potential impact of cannabinoid use on limiting opioid overdose risk and to determine whether specific products are more beneficial for certain populations of patients with pain and opioid use,” said Arthur Robin Williams, MD, a professor in the Division on Substance Use Disorders in the Columbia University Department of Psychiatry.
The pilot study involved 76 neuropathy patients in New York State who were given Columbia Care’s dose-metered cannabis products for nine months. By the end of the study, 62 percent of the patients were able to reduce or stop using opioid pain medication.
Columbia Care makes a variety of medical cannabis products that come in tablets, tinctures, suppositories, topical formulations or can be used in vaporizers.
“We have seen through this pilot study the power of our proprietary formulations to reduce our patients’ dependence on opioids in a defensible, scientific manner,” said Rosemary Mazanet, MD, chief science officer and chair of the scientific advisory board at Columbia Care.
Although medical marijuana is often touted as a possible solution to the nation’s opioid crisis, research findings so far have been mixed.
A recent study by the RAND Corporation found little evidence that states with medical marijuana laws see reductions in legally prescribed opioids. While some pain patients may be using or experimenting with medical marijuana, RAND researchers do not believe they represent a significant part of the opioid analgesic market.
"If anything, states that adopt medical marijuana laws... experience a relative increase in the legal distribution of prescription opioids,” researchers found.
Another study of Medicare and Medicaid patients found that prescriptions for morphine, hydrocodone and fentanyl dropped in states with medical marijuana laws, while daily doses for oxycodone increased. A second study found a 6% decline in opioid prescribing to Medicaid patients in states with medical marijuana laws. Both studies were conducted during a period when nationwide opioid prescribing was already in decline.
A 2014 study published in JAMA Internal Medicine found that opioid overdoses declined by nearly 25 percent in states where medical marijuana was legalized.