Rates and correlates of medicine disposal program implementation at pharmacies in North Carolina: A longitudinal study, 2016-2021.

BACKGROUND: Unused prescription opioids from family and friends continue to be the primary access point to prescription opioids for nonmedical use among youth. Implementation of medicine disposal boxes at pharmacies is one approach to facilitate removal of unused prescription opioids from the home to prevent diversion. OBJECTIVES: We sought to examine the implementation rates of disposal boxes at pharmacies in North Carolina from 2016 to 2021 and place-based health disparities in availability. METHODS: We identified pharmacies with a disposal box in 2016, 2018, and 2021 among licensed pharmacies in North Carolina in 2018 (N = 2587). We computed descriptive statistics to describe disposal box implementation rates over time and used geographic information systems to identify spatial trends. We used separate logistic regression models in 2018 and 2021 to assess the relationship between neighborhood characteristics and the likelihood of a pharmacy implementing a disposal box. RESULTS: We found an increase in disposal boxes over time with 43 pharmacies (1.7%) in 2016, 144 (5.6%) in 2018, and 350 (13.5%) in 2021 implementing a disposal box. In 2018, independent pharmacies were more likely than chains to have a disposal box. In 2021, medical-affiliated and pharmacies defined as "other" were less likely than chains to have a disposal box. In both 2018 and 2021, pharmacies in census tracts with a higher percentage of the population below the federal poverty line were more likely to have a disposal box. In 2021, pharmacies in tracts with a higher percentage of the population unemployed were less likely to have a disposal box. In 2018, pharmacies located in counties with a greater number of opioid overdose deaths were more likely to have a disposal box. CONCLUSION: Our findings highlight the growth of disposal boxes in North Carolina over time and the potential for continued expansion to provide opportunities to prevent prescription opioid diversion.