Background
Unintentional overdose involving opioid analgesics is a leading cause of injury-related death in the United States.
Objectives
To evaluate the feasibility and impact of implementing naloxone prescription to patients prescribed opioids for chronic pain.
Design
2-year non-randomized intervention study.
Setting
6 safety net primary care clinics in San Francisco.
Participants
1985 adults receiving long-term opioids for pain.
Intervention
Providers and clinic staff were trained and supported in naloxone prescribing.
Measurements
Outcomes were proportion of patients prescribed naloxone, opioid-related emergency department (ED) visits, and prescribed opioid dose based on chart review.
Results
38.2% of 1,985 patients on long-term opioids were prescribed naloxone. Patients on higher doses of opioids and with a past 12-month opioid-related emergency department (ED) visit were independently more likely to be prescribed naloxone. Patients who received a naloxone prescription had 47% fewer opioid-related ED visits per month six months after the receipt of the prescription (IRR=0.53, 95%CI=0.34–0.83, P=0.005) and 63% fewer visits after one year (IRR=0.37, 95%CI=0.22–0.64, P<0.001), compared to patients who did not receive naloxone. There was no net change over time in opioid dose among those who received naloxone compared to those who did not (IRR 1.03, 95% CI 0.91–1.27, P = 0.61).
Limitations
Results are observational and may not be generalizable beyond safety net settings.
Conclusion
Naloxone can be co-prescribed to primary care patients prescribed opioids for pain. When advised to offer naloxone to all patients on opioids, providers may prioritize those with established risk factors. Providing naloxone in primary care settings may have ancillary benefits such as reducing opioid-related adverse events.
Funding Source
National Institutes of Health grant R21DA036776