Patients may be at higher risk of overdose when opioid therapy for pain is discontinued

pill
Credit: CC0 Public Domain

Opioid-related overdose is now a leading cause of accidental death in the United States and Canada. A study published December 1 in the open access journal PLOS Medicine by Mary Clare Kennedy at University of British Columbia, Kelowna, Canada, and colleagues suggests discontinuing prescribed opioids was associated with increased overdose risk.

Canada and the United States have implemented guidelines to restrict opioid prescribing for chronic pain in an effort to reduce opioid-related illness and death. However, the effects of discontinuing opioid treatments on overdose risk are understudied.

In order to better understand associations between discontinuation of prescribed opioid therapy for pain and risk of overdose, researchers conducted a retrospective cohort study of people receiving long-term opioid therapy for pain in British Columbia between October 2014 and June 2018. They analyzed the of 14,037 patients registered with the provincial health insurance client roster in British Columbia who had been on opioid therapy for at least 90 days.

The researchers found that discontinuing opioid therapy for pain was associated with increased overdose risk among people without opioid use disorder (OUD). Yet the association was stronger in those with OUD, including those not receiving opioid agonist therapy (AHR = 3.18; 95% CI = 1.87–5.40, p<0.001) and receiving opioid agonist therapy (AHR = 2.52; 95% CI = 1.68–3.78, p<0.001). Finally, tapering was associated with decreased risk of overdose in those with OUD who had not received opioid agonist therapy (AHR = 0.31, 95% CI = 0.14–0.67, p=0.003).

The study had several limitations as the outcome measure did not capture overdose events that did not involve a healthcare encounter or result in death. Additionally, the researchers were unable to determine the source of the drugs involved in overdoses and whether they were prescribed or obtained illicitly.

According to the authors, "These findings point to the need to avoid abrupt discontinuation of opioid treatment for pain and to enhance guidance for prescribers in modifying opioid treatment tapering strategies on the basis of opioid use disorder and opioid agonist therapy status."

Kennedy adds, "Given the increased risk of overdose, sudden discontinuation of opioid treatment for should be avoided in almost all instances. Enhanced guidance is needed to support prescribers in implementing safe and effective opioid for tapering strategies, with particular consideration of opioid use disorder and prescribed opioid agonist therapy status."

More information: Discontinuation and tapering of prescribed opioids and risk of overdose among people on long-term opioid therapy for pain with and without opioid use disorder in British Columbia, Canada: A retrospective cohort study. PLoS Medicine (2022). DOI: 10.1371/journal.pmed.1004123

Journal information: PLoS Medicine

Citation: Patients may be at higher risk of overdose when opioid therapy for pain is discontinued (2022, December 1) retrieved 1 February 2023 from https://medicalxpress.com/news/2022-12-patients-higher-overdose-opioid-therapy.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.

Explore further

Study examines polyneuropathy and long-term opioid use

21 shares

Feedback to editors