What is ISSUP?
We are an international network that unites, connects and shares knowledge across the substance use workforce. We aim to make the work of our members as effective as possible through knowledge sharing, training and networking opportunities.
Who is ISSUP for?
ISSUP is for everyone who is doing something to address substance use in a variety of settings. This includes health and treatment professionals, prevention practitioners, market disruption and supply, law enforcement, policy makers, and community-led groups like youth and volunteers.
53,914 ISSUP Members worldwide
Map showing distribution of ISSUP members around the world
News
ISSUP Newsletter - Issue 227 (15 October 2026)
In this issue, we’re sharing the fourth and final episode of the The Road After Prison: Care, Recovery and Safer Communities podcast with Michael Chaple, alongside a new reading list highlighting key insights from ISSUP 2026 Virtual Conference.
Latest Webinars
Intervenciones psicosociales basadas en la evidencia en los trastornos por consumo de sustancias: implicaciones para la práctica profesional.
ISSUP Spain lo invita cordialmente a participar en su seminario web sobre Intervenciones psicosociales basadas en la evidencia en los trastornos por consumo de sustancias: implicaciones para la práctica profesional.
Location Online
Date 27 October 2026
Knowledge Share
The introduction of drug Arrest Referral schemes in London: A partnership between drug services and the police
Published by Gillian Hunter, Tim McSweeney, Paul J. Turnbull, The introduction of drug Arrest Referral schemes in London: A partnership between drug services and the police, International Journal of Drug Policy, Volume 16, Issue 5, 2005, Pages 343-352, ISSN 0955-3959, https://doi.org/10.1016/j.drugpo.2005.06.008.
Knowledge Share
Psychosocial determinants of recidivism risk among incarcerated individuals with a history of substance use: A systematic review
Published by Syasyila, K., Kamaluddin, M., Nor, H. A. Mohd., & Singh, P. S. J. (2025). Psychosocial determinants of recidivism risk among incarcerated individuals with a history of substance use: A systematic review. PLOS One, 20. https://doi.org/10.1371/journal.pone.0327810
Date 11 Jul 2025
The ISSUP Exchange Podcast
The Road After Prison: Care, Recovery and Safer Communities with Michael Chaple Pt.4
In this fourth and final episode of The Road After Prison: Care, Recovery and Safer Communities, Professor Goodman Sibeko is joined by Michael Chaple to explore how re-entry success can be measured beyond recidivism. Michael discusses the importance of treatment engagement, health and wellbeing, stable housing, employment, financial security, and social reintegration in understanding how people rebuild their lives after incarceration.