This issue includes the following themes

The meanings of the terms alcoholism, alcohol dependence, alcohol misuse and risky drinking, the possibility of drinkers switching to other substances in response to any rise in the cost of alcohol, methodological challenges for research in psychedelics use and its consequences, and Sweden’s long, complicated harm reduction policy transition

The constitution of the alcoholic self, communicative processes and administrative practices: On the varied uses of four terms denoting problematic drinking
Filip Roumeliotis, Frida Carlsson, Linn Johansson Erkenfelt, Lisa Wallander

Adapting existing behaviour: Perceptions of substance switching and implementation of minimum pricing for alcohol in Wales
Wulf Livingston, Katy Holloway, Tom May, Marian Buhociu, Iolo Madoc-Jones, Andy Perkins

Who is the typical psychedelics user? Methodological challenges for research in psychedelics use and its consequences
Petter Grahl Johnstad

Knowledge, attitudes and practice of self-medication among university students in Portugal: A cross-sectional study
Regina Ferreira Alves, José Precioso, Elisardo Becoña

Could 30 years of political controversy on needle exchange programmes in Sweden contribute to scaling-up harm reduction services in the world?
Niklas Karlsson, Torsten Berglund, Anna Mia Ekström, Anders Hammarberg, Tuukka Tammi

Ecstasy (MDMA): A rebellion coherent with the system
José Manuel García-Montes, Marino Pérez-Álvarez, Miguel Ángel Sánchez-Moya, José Alberto Carmona Torres, David F. Carreno, Salvador Perona Garcelán, Laura del Carmen Sánchez-Sánchez