U.S. Healthcare Workers' Perspective of Outpatient Provision of Methadone: A Scoping Review

Abstract

Background: A recent National Institute on Drug Addiction Call to Action focused on expanding methadone treatment access for individuals with opioid use disorder (OUD). One research priority identified was optimal educational and support structures, including training to provide methadone across multiple healthcare settings (e.g., primary care, opioid treatment programs [OTPs], pharmacies) and healthcare workers (HCWs) (e.g., providers, pharmacists). This scoping review sought to better understand HCWs' knowledge, attitudes, and stigma as it relates to methadone provision.

Methods: Four databases (PubMed, PsycInfo, CINAHL, Web of Science) were searched for publications between 2010 and 2022 using keywords-methadone, HCW, outpatient setting, knowledge, attitudes, and stigma, focusing on HCWs in general and pharmacists specifically.

Results: A total of 2,747 articles were identified and 14 met inclusion criteria for review. Settings included OTPs (n = 4), specialty addiction treatment clinics (n = 3), community pharmacies (n = 2), and multiple settings (n = 5). All articles (n = 14) examined methadone-related attitudes. Despite approval of methadone in 1972 to treat OUD, four articles illustrated continued methadone-related stigma held by HCWs. In response to COVID-19-related policy changes allowing methadone take-home flexibility, OTP clinicians expressed a range of attitudes concerning patient risk and potential program liability around diversion and misuse. One article assessing knowledge suggested that, even when most pharmacists correctly answered knowledge questions, a significant minority had misunderstandings that could undermine effective treatment.

Conclusions: Given the current imbalance between methadone treatment demand and availability, there is a critical need to expand outpatient methadone services. Pharmacists partnering with OTPs represent a logical but underutilized access point. We identified key areas to improve HCWs methadone-related knowledge, attitudes, and stigma. Future research should explore the impact of outpatient pharmacy-OTP and other expansion services, and systematic training, education, and evaluation of methadone-related understanding, including assessment tools to measure knowledge, attitudes, and stigma.

Keywords: attitude; knowledge; methadone; pharmacy; stigma.