Overdose risk for veterans receiving opioids from multiple sources.

Am J Manag Care

Center for Healthcare Organization and Implementation Research, Bedford VA Medical Center, 200 Springs Rd, Bedford, MA 01730. Email:

Published: November 2018

AI Article Synopsis

  • - The study aimed to determine if veterans in Massachusetts getting opioids and/or benzodiazepines from both VHA and non-VHA pharmacies face a greater risk of negative health events compared to those solely using VHA pharmacies.
  • - It included 16,866 veterans, finding that those using both pharmacy types (dual care users) were more likely to reside in rural areas, receive high-dose opioid therapy, have concurrent opioid and benzodiazepine prescriptions, and exhibit opioid use disorder.
  • - Results indicated that dual care users had higher odds of nonfatal opioid overdose and increased all-cause mortality, suggesting that managing prescriptions better between VHA and non-VHA could enhance patient safety.

Article Abstract

Objectives: The aim of this study was to evaluate whether veterans in Massachusetts receiving opioids and/or benzodiazepines from both Veterans Health Administration (VHA) and non-VHA pharmacies are at higher risk of adverse events compared with those receiving opioids at VHA pharmacies only.

Study Design: A cohort study of veterans who filled a prescription for any Schedule II through V substance at a Massachusetts VHA pharmacy. Prescriptions were recorded in the Massachusetts Department of Public Health Chapter 55 data set.

Methods: The study sample included 16,866 veterans residing in Massachusetts, of whom 9238 (54.8%) received controlled substances from VHA pharmacies only and 7628 (45.2%) had filled prescriptions at both VHA and non-VHA pharmacies ("dual care users") between October 1, 2013, and December 31, 2015. Our primary outcomes were nonfatal opioid overdose, fatal opioid overdose, and all-cause mortality.

Results: Compared with VHA-only users, more dual care users resided in rural areas (12.6% vs 10.6%), received high-dose opioid therapy (26.3% vs 7.3%), had concurrent prescriptions of opioids and benzodiazepines (34.8% vs 8.2%), and had opioid use disorder (6.8% vs 1.6%) (P <.0001 for all). In adjusted models, dual care users had higher odds of nonfatal opioid overdose (odds ratio [OR], 1.29; 95% CI, 0.98-1.71) and all-cause mortality (OR, 1.66; 95% CI, 1.43-1.93) compared with VHA-only users. Dual care use was not associated with fatal opioid overdoses.

Conclusions: Among veterans in Massachusetts, receipt of opioids from multiple sources was associated with worse outcomes, specifically nonfatal opioid overdose and mortality. Better information sharing between VHA and non-VHA pharmacies and prescribers has the potential to improve patient safety.

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