The project at a glance

Observational cohort study with regular follow-ups that combines in-person data collection, linkage of health data available in clinical-administrative databases, and development of a peer approach to address the current and emerging needs of people who use psychoactive substances by injection. 

Status: Upcoming recruitment


Among the multiple comorbidities associated with substance use disorders and injection, hepatitis C (HCV) and chronic non-cancer pain (CNCP) (i.e. intermittent or continuous pain for more than 3 months) are frequent and often coexisting conditions that cause a significant societal burden. The modalities of peer support in these conditions among people who use psychoactive substances by injection have been understudied, particularly in Quebec.


  • Characterize the experience of chronic pain among people who inject substances and advance knowledge about the relationship between pain, substance use, and subsequent adverse outcomes.
  • Co-construct a peer approach to improve the well-being and engagement in health and care of people who inject substances and are struggling with hepatitis C and/or chronic pain.


  • Canadian Institutes of Health Research
  • Health Canada
  • Ministère de la santé et des services sociaux du Québec
  • Institut universitaire sur les dépendances
  • CIUSSS du Centre-Sud de l’Île de Montréal

Principal investigator

Co-investigator and collaborators

For more information

For more information about the project, please contact Molly Nuckle, Project Coordinator, at

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