"Reduced diversion (e.g., doctor shopping, theft, prescription forgery, illegal sale by physicians, patients, or pharmacists) and abuse of prescription drugs are goals for all prescription drug monitoring programs (PDMPs). However, there is variability in how individual states implement and operationalize these programs, including policies and mechanisms for law enforcement access and utilization. This project used qualitative and quantitative methods to examine law enforcement use and perceptions of PDMPs. Findings suggest that training in how to access the PDMP and interpret PDMP reports are important factors in how law enforcement personnel perceive the utility and effectiveness of PDMPs. In addition, law enforcement personnel view lack of access to PDMP data from surrounding states as a hindrance to investigations. The variability in how states permit law enforcement access to PDMP data should be further studied to clarify the impact of various access designs on PDMP goals, including reductions in abuse, diversion, morbidity and mortality related to illicit prescription drug use."