By Pat Anson, PNN Editor

Discontinuing opioid therapy for people with chronic pain raises the risk of a patient dying from an overdose, according to a new Canadian study that calls for better guidance for healthcare providers on the risks associated with abrupt tapering.

Researchers analyzed the medical histories of over 14,000 pain patients in British Columbia who were on long term opioid therapy from 2014 to 2018 – a period when physicians in Canada and the United States were being urged to restrict opioid prescriptions due to a worsening overdose crisis. The vast majority of patients studied were either tapered to a lower dose or their opioid treatment was discontinued, regardless of whether they showed signs of opioid use disorder (OUD).  

The study findings, published in PLOS Medicine, show that discontinuing opioid therapy for pain was associated with increased overdose risk. The association was even stronger for the small minority of patients diagnosed with OUD. In total, 530 people in the study (3.8%) experienced either a fatal or non-fatal overdose, with 120 of them dying.

“Our findings underscore the need for healthcare providers and policymakers to carefully consider potential unintended adverse effects of discontinuing opioid treatment for chronic pain when developing prescribing interventions and making practice decisions,” wrote lead author Mary Clare Kennedy, PhD, a Research Scientist with the BC Centre on Substance Use and a Research Fellow at the University of British Columbia.

“Given the harms of opioid treatment discontinuation identified in this and past studies, non-consensual and abrupt discontinuation of opioid treatment for pain is contraindicated in almost all instances.”

Kennedy and her colleagues were unable to determine what substances were involved in the overdoses, but they believe some patients who had their opioid therapy stopped may have resorted to illicit fentanyl and other street drugs to manage their pain, withdrawal and other symptoms. Over 73% of the overdose deaths that occurred in British Columbia during the study period involved fentanyl.

Previous studies have also found that opioid tapering raises the risk of an overdose and mental health crisis. A study published last year in JAMA found that tapered patients were 68% more likely to be treated for opioid withdrawal, drug overdose or alcohol intoxication, and they were twice as likely to experience depression, anxiety or a suicide attempt.

The FDA warned in 2019 that rapid tapering or abrupt discontinuation of opioids could result in serious harm to patients, including withdrawal, uncontrolled pain, psychological distress and suicide.

‘Reckless Mistreatment of Patients’

Despite this growing body of evidence, forced tapering and opioid discontinuation continues – some of it caused by the heavy-handed tactics of law enforcement. Over 200 pain patients were recently cut off from opioids after their California doctor had his DEA license suspended without warning. One patient and his wife died by suicide within a week of the DEA’s action.

“Not only are we collectively causing harm, we are failing to stop causing harm even when we agree that we're causing it, which is actually worse,” says Stefan Kertesz, MD, an associate professor at the University of Alabama at Birmingham, who is leading a study of pain patient suicides.

Kertesz says regulators, insurers, journalists and law enforcement have misinterpreted overdose studies to suggest that opioid prescribing, particularly at higher doses, was the root cause of the overdose crisis.  

“Many clinicians and policymakers engaged in aggressive extrapolation that went far beyond the data. Many journalists and legal plaintiffs described the prescriptions in a way that aggravated matters. They made dose into a fetish, a performance metric, and a threshold for law enforcement,” Kertesz told PNN. “Dose based quality metrics, payor standards and legal investigation thresholds incentivize reckless mistreatment of patients.

“My ultimate question is when will agencies like the National Committee for Quality Assurance, the Office of Inspector General, and law enforcement actually come to appreciate the evidence in play?”

It took six years, but the CDC recently revised its 2016 opioid guideline to include specific language warning of the dangers of tapering or discontinuing opioids.

“Clinicians should avoid abrupt discontinuation of opioids, especially for patients receiving high dosages of opioids, should avoid dismissing patients from care, and should ensure appropriate care for patients with pain and patients with complications from opioid use,” the revised guideline states.