Varia Vol. 30, 2024/4 - pagesPages 7 to 9EditorialBy Pierre PoloméniPages 11 to 37From the prevention of “addictive behaviors” in the workplace to an ecosystemic approach to psychoactive substance useBy Renaud Crespin, Dominique Lhuilier, Gladys Lutz NalePages 39 to 56Determinants of problematic use of social networksBy Jean-Pierre Mbamé, Adolf Moté, Lilly Berthe Kouemo Sopdom, Prosper Gnassiri Godwe, Lamou BonoyPages 57 to 91“Street drug” or “medication”? A qualitative study of the social representation of heroin within an outpatient hospital unit prescribing pharmaceutical heroinBy Maurane Bosson, Olivier Simon, Yasser Khazaal, Joël Billieux, Francesco Panese, Sophie ParozPages 93 to 110Integration of psychedelics in CBT: Effects on decenteringBy Daniele Zullino, Louise Penzenstadler, Federico Seragnoli, Tatiana Aboulafia Brakha, Gabriel Thorens