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Swiss Research Institute for Public Health and Addiction

CANreduce (Mindfulness)


Investigating the impact of mindfulness therapy and cognitive behavioural therapy in internet-based self-help for people who have problems due to their cannabis use. 

Project Manager Michael Schaub
Duration April 2020 – March 2024
Client / Funding partner(s)

Schweizerischer Nationalfond

Cooperating partner  


Internet-based self-help can offer a promising alternative for people seeking help with problems related to their cannabis use. Many of these people do not seek out standard addiction therapy because they are afraid of social exclusion or because they have the desire to reduce their cannabis consumption by their own efforts. A self-help interface on the internet based on mindfulness could reach a broader group of such people and in the long term strengthen the effects of interventions based solely on cognitive behavioural therapy.


The current study aims to test the effectiveness of a newly developed, mindfulness-based self-help interface on the Internet with 606 people seeking help who have problems due to their cannabis use and want to reduce it. In addition, the study will identify relevant success factors for the reduction of cannabis use. In addition to the reduction of cannabis use, the study is also interested in possible improvements in mental health and satisfaction with participation.

Scientific and social context

In addition to new scientific findings on Internet-based self-help for cannabis problems and the promotion of mental health, this study is also relevant to practice. The completed CANreduce 2.0 study, on which the CANreduce Mindfulness Study is based on, has produced similarly good effects to those reported in recent years from face-to-face cognitive behavioural therapy.


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