Importance: Given high rates of opioid-related fatal overdoses, improving naloxone access has become a priority. States have implemented different types of naloxone access laws (NALs) and there is controversy over which of these policies, if any, can curb overdose deaths. We hypothesize that NALs granting direct authority to pharmacists to provide naloxone will have the greatest potential for reducing fatal overdoses.
Objectives: To identify which types of NALs, if any, are associated with reductions in fatal overdoses involving opioids and examine possible implications for nonfatal overdoses.
Design, setting, and participants: State-level changes in both fatal and nonfatal overdoses from 2005 to 2016 were examined across the 50 states and the District of Columbia after adoption of NALs using a difference-in-differences approach while estimating the magnitude of the association for each year relative to time of adoption. Policy environments across full state populations were represented in the primary data set. The association for 3 types of NALs was associated: NALs providing direct authority to pharmacists to prescribe, NALs providing indirect authority to prescribe, and other NALs. The study was conducted from January 2017 to January 2019.
Exposures: Fatal and nonfatal overdoses in states that adopted NAL laws were compared with those in states that did not adopt NAL laws. Further consideration was given to the type of NAL passed in terms of its association with these outcomes. We hypothesize that NALs granting direct authority to pharmacists to provide naloxone will have the greatest potential for reducing fatal overdoses.
Main outcomes and measures: Fatal overdoses involving opioids were the primary outcome. Secondary outcomes were nonfatal overdoses resulting in emergency department visits and Medicaid naloxone prescriptions.
Results: In this evaluation of the dispensing of naloxone across the United States, NALs granting direct authority to pharmacists were associated with significant reductions in fatal overdoses, but they may also increase nonfatal overdoses seen in emergency department visits. The effect sizes for fatal overdoses grew over time relative to adoption of the NALs. These policies were estimated to reduce opioid-rated fatal overdoses by 0.387 (95% CI, 0.119-0.656; P = .007) per 100 000 people in 3 or more years after adoption. There was little evidence of an association for indirect authority to dispense (increase by 0.121; 95% CI, -0.014 to 0.257; P = .09) and other NALs (increase by 0.094; 95% CI, -0.040 to 0.227; P = .17).
Conclusions and relevance: Although many states have passed some type of law affecting naloxone availability, only laws allowing direct dispensing by pharmacists appear to be useful. Communities in which access to naloxone is improved should prepare for increases in nonfatal overdoses and link these individuals to effective treatment.