Prescription opioids following herpes zoster: An observational study among insured adults, United States, 2007-2021.

Background: The opioid overdose epidemic has resulted in hundreds of thousands of overdose deaths in the United States (US). One indication for opioids is herpes zoster (HZ)-a common painful condition with an estimated 1 million cases occurring annually in the US.

Objective: We aimed to characterize prescription opioid claims and trends among patients with HZ who were previously opioid naive.

Design: We used a cohort study involving three insurance claims databases in the US. We included all beneficiaries 18-64 years (commercial and Medicaid) and beneficiaries 65 years and older (Medicare) who were diagnosed with incident HZ during 2007-2021. We determined the proportion of opioid-naive patients with HZ who filled an opioid prescription within 30 days and 180 days following HZ diagnosis. We also examined trends over the study period, proportion receiving moderate, high dosages (50-89 morphine milligram equivalent [MME], and ≥90 MME per day), and long-term receipt.

Results: Among all three insurance databases, 2,595,837 patients had an incident episode of HZ and were opioid naive during the prior 6 months. Within 30 days following HZ, 623,515 (24 percent) filled a prescription for an opioid. The percentage with an opioid claim declined during 2007-2021 for all groups; 65 percent for commercially insured patients, 51 percent for Medicaid-insured patients, and 60 percent for Medicare-insured patients. Approximately 8-15 percent of all beneficiaries received moderate and 2-6 percent received high dosage opioids. Long-term prescription opioid use of at least 6 months was found in 7-12 percent of the patients.

Conclusions: Continuing trends in judicious opioid prescribing as well as use of recommended HZ vaccines may decrease opioid prescriptions for HZ.