A mapping review of NIDA-funded implementation research studies on treatments for opioid and/or stimulant use disorders.

BACKGROUND: The biomedical research enterprise invests greatly in discovery-oriented science, but significantly less in how to implement the most effective of these innovations. The return on investment in public health benefit is therefore low. In the context of substance-related overdose epidemics, presently with opioids and/or stimulants, the gap in proven treatments and routine access is amplified. Implementation research is designed to deepen understanding of how best to scale-up proven treatments. This study assessed how implementation research has been deployed in the National Institute on Drug Abuse (NIDA) efforts to address the opioid and stimulant epidemics. METHODS: Adapting a procedure developed to categorize HIV-focused research, a four-stage systematic mapping review of NIDA-funded R01, R34, R61, and U studies pertaining to opioids and/or stimulants funded between 2015 and 2019 was performed. Abstracts were retrieved using NIH Research Portfolio Online Reporting Tools. Key study characteristics were abstracted and coded by two independent reviewers. RESULTS: An initial search across NIH institutes yielded 5963 relevant records. Of these, 666 (11.2 %) were NIDA funded. One-hundred-and-thirty-four (20.1 %) of the 666 studies were opioid and/or stimulant treatment related. Of these, 28 (4.2 %) were categorized as Implementation Preparation (IP), and 16 (2.4 %) were categorized as Implementation Research (IR). Over the five-year period, there was a gradual increase in both IP and IR studies. CONCLUSIONS: Implementation research is a small but slowly growing component of the federal portfolio to address substance-related public health issues. To more effectively respond to contemporary overdose epidemics, implementation research must take on an even more significant role.