“…Recent studies support the efficacy of PDMP in reducing opioid shopping behavior and overdose events(Bao et al, 2016; Buchmueller & Carey, 2017;Moyo et al, 2017; Patrick, Fry, Jones, & Buntin, 2016; Wen, Schackman, Aden, & Bao, 2017), although these findings are not universal. (Deyo et al, 2017; Nam, Shea, Shi, & Moran, 2017; Sun, Charlesworth, et al, 2017; Yarbrough, 2017) PDMP characteristics such as mandatory registration(Wen et al, 2017), mandatory use(Brown et al, 2017; Buchmueller & Carey, 2017; Pardo, 2016; Suffoletto, Lynch, Pacella, Yealy, & Callaway, 2017), clinical decision support, and monitoring of high risk activity(Pardo, 2016) are associated with greater efficacy. Several studies also suggest that providers alter prescribing behavior when given unsolicited PDMP data.…”