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.
53,835 ISSUP Members worldwide
Map showing distribution of ISSUP members around the world
News
ISSUP Newsletter - Issue 226 (30 September 2026)
In this issue, we are excited to introduce ISSUP Academy, our new professional learning platform bringing courses, training and learning opportunities together in one place.
Latest Webinars
ISSUP UK Relaunch: Recognising the Overlooked Impact of Substance Use Bereavement
ISSUP UK presents its relaunch webinar, “Recognising the Overlooked Impact of Substance Use Bereavement.” The webinar will explore the experiences of those affected by substance use bereavement, including the impact of stigma, culture and complex grief, and consider compassionate approaches to support bereaved individuals and families.
Location Online
Date 13 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.3
In this third episode, Professor Goodman Sibeko and Michael Chaple look at what happens when re-entry support exists but the systems around it do not work together. Michael shares his experience of the barriers that can limit successful reintegration, from gaps in resources and competing priorities to organisations working in isolation.
Date 30 Sep 2026