Understanding the risks and benefits of opioid substitution treatment in Europe: triangulating data from monitoring and research sources Reitox sponsored session Thursday, 24 September 2015, 12.45–14.15, Room 3 Chaired by Alessandro Pirona, EMCDDA Introduction by the Chair Opioid substitution treatment and methadone-related deaths in Ireland — Suzi Lyons, Senior Researcher, Health Research Board, Dublin (Ireland) Risks and benefits of opioid substitution treatment in Austria — Marion Weigl, Head of the Austrian Reitox focal point, Austrian Public Health Institute, Gesundheit Österreich Strong and weak points of opioid substitution treatment in the Czech Republic — Viktor Mravčík, Head of the National Monitoring Centre for Drugs and Addiction, Office of the Government of the Czech Republic Assessing 20 years of opioid substitution treatment in France — Anne-Claire Brisacier, Head of studies, French monitoring centre for drugs and drug addiction Debate and conclusions Free lunch boxes will be provided to all attendees