'I just thought that was the best thing for me to do at this point': Exploring patient experiences with depot buprenorphine and their motivations to discontinue.

Long-acting injectable depot buprenorphine is a recent addition to the suite of opioid agonist therapies (OAT) used to treat opioid use disorder (OUD). However, there has been little research that focuses on the lived experience of people receiving depot buprenorphine treatment and reasons for why people decide to discontinue. The aim of this study was to explore what it is like to receive depot buprenorphine and to understand the motivations behind why people discontinue. Open-ended, semi-structured interviews were conducted between November 2021 and January 2022 with individuals who were either currently receiving depot buprenorphine or had discontinued or were in the process of discontinuing depot buprenorphine. Liberati, et al.'s (2022) adaptation of Dixon-Woods's (2006) candidacy framework was used to analyse the participant experiences. 40 participants (26 male, 13 female, 1 undisclosed; mean age 42 years) were interviewed about their experience with depot buprenorphine. At the time of the interview, 21 were currently receiving depot buprenorphine and 19 had discontinued this treatment or were in the process of discontinuing. Participants cited 4 key reasons why they decided to discontinue depot buprenorphine:1) feeling forced into the program, 2) experiencing negative side-effects, 3) finding the treatment ineffective, and 4) wanting to stop depot buprenorphine/OAT to use opioids again or feeling 'cured' and no longer in need of OAT. Participants were ultimately discussing issues related to clinician-patient power relations, agency and bodily autonomy, and the pursuit of well-being. Depot buprenorphine remains a promising treatment for OUD and offers potential to improve treatment adherence. Instances of restricted OAT choice and consumer concerns regarding a lack of agency must be addressed in order to enhance therapeutic relationships. Clinicians and other healthcare workers in this field also need greater access to information about depot buprenorphine to better address issues patients face during treatment. More research is required to understand patient and treatment choice given the options of these new treatment formulations.

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Declarations of Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.