By Pat Anson, PNN Editor

A new analysis of fatal opioid overdoses in British Columbia found that only about 2% of the deaths were caused by prescription opioids alone. The other overdoses mainly involved illicit fentanyl and other street drugs or a combination of illicit drugs and other medications, which were often not prescribed.

“Our data show a high prevalence of nonprescribed fentanyl and stimulants, and a low prevalence of prescribed opioids detected on toxicology in people who died from illicit drug overdose. These results suggest that strategies to address the current overdose crisis in Canada must do much more than target deprescribing of opioids,” researchers reported in the Canadian Medical Association Journal (CMAJ).

Vancouver, British Columbia was the first major North American city to be hit by a wave of overdoses involving illicit fentanyl, a potent synthetic opioid. A public health emergency was declared in BC in 2016 and strict guidelines were released to limit opioid prescribing. Although prescriptions dropped dramatically, fatal overdoses in BC continued to rise.

Researchers looked at 1,789 fatal overdoses in BC from 2015 to 2017 for which toxicology reports were available and found that 85% of them involved an opioid. Of those, only 2.4% of the deaths were linked to opioid medication alone. Another 7.8% of cases involved a combination of prescribed or non-prescribed opioids.

The findings are similar to a 2019 study of opioid overdoses in Massachusetts, which found that only 1.3% of the people who died had an active prescription for opioid medication.   

“Pain patients and their medications have never been responsible for overdose deaths – not then or now. Will the anti-opiate zealots, with all their data-dredged studies be taken to task for all the unnecessary suffering, disability, and premature deaths they have contributed to within the Canadian pain population?” asked Barry Ulmer, Executive Director of the Chronic Pain Association of Canada, a patient advocacy group.

“The ‘prohibition’ approach that has wrongly been applied for years that focused on reducing access to pharmaceutical products directly contributed to exposure to higher risk illicit substances, which put people at risk of overdose.”

Most Overdoses Linked to Illicit Fentanyl

Researchers say efforts to reduce opioid prescribing in Canada were “insufficient to address the current overdose crisis” because street drugs are involved in the vast majority of deaths. They also warned against the forced tapering of patients on opioid pain medication.

“The risk of harms from these medications must be balanced with the potential harms of nonconsensual discontinuation of opioids for long-term users, including increased pain, risk of suicide and risk of transition to the toxic illicit drug supply,” wrote lead author Alexis Crabtree, MD, resident physician in Public Health at the University of British Columbia.  

Crabtree and her colleagues found that most overdoses involved a street drug, with fentanyl or fentanyl analogues linked to nearly 8 out of 10 overdose deaths. Many of the deaths involved multiple substances, including medications such as stimulants, anti-depressants, benzodiazepines, antipsychotics and gabapentinoids, which were often not prescribed to the victim.   

Over 7% of the overdoses involved methadone or buprenorphine (Suboxone), opioids that are used to treat addiction. About a third of the people who died had a diagnosis of substance use disorder in the year before their overdose.

In a commentary also published in CMAJ, a leading public health expert said it was time to decriminalize drugs and offer a “safe supply” to illicit drug users.

“Unless there is a radical change in our approach to the epidemic, overdose deaths will continue unabated. It is time to scale up safe supply and decriminalize drug use,” wrote Mark Tyndall, MD, Executive Director of BC Centre for Disease Control and a professor at the School of Population and Public Health, University of British Columbia.

Tyndall says blaming the opioid crisis on excess prescribing by doctors and the unethical marketing of opioids by pharmaceutical companies fails to address the reasons people abuse drugs in the first place.

“While having a cheap and ready supply of opioid drugs does allow for misuse and addiction, this narrative fails to acknowledge that drug use is largely demand-driven by people seeking to self-medicate to deal with trauma, physical pain, emotional pain, isolation, mental illness and a range of other personal challenges and these are the people overdosing,” Tyndall wrote.

(Update: Canada’s Chief Public Health Officer, Dr. Theresa Tam, issued a statement August 26 saying the COVID-19 pandemic is contributing to an increase in drug overdoses and deaths across Canada.

“There are indications that the street drug supply is growing more unpredictable and toxic in some parts of the country, as previous supply chains have been disrupted by travel restrictions and border measures. Public health measures designed to reduce the impact of COVID-19 may increase isolation, stress and anxiety as well as put a strain on the supports for persons who use drugs,” Tam said.

“For the third consecutive month this year, the number of drug overdose deaths recorded in British Columbia has exceeded 170. These deaths represent a 136% increase over the number of deaths recorded in July 2019. There are news reports of an increase in overdoses in other communities across the country.” )