There is a significant and growing body of evidence on the relationship between mental illness and cannabis, according to this landmark report by the Mental Health Council of Australia. Research has found evidence suggesting that regular cannabis use, particularly by those who begin using at a young age, increases the risk of mental illness. The Council’s report found that:

· Cannabis use increases young people’s risk of mental illness, particularly those with a family history of psychosis;

· Cannabis makes almost any mental illness worse;

· Cannabis use is associated with other adverse outcomes such as poor education and employment outcomes.

This report aims to provide a balanced and informed view on the relationship between cannabis and mental illness. It summarises the research and states the MHCA’s position on activities and directions that governments and the mental health sector should pursue based on the existing evidence. It also highlights where the need to invest in the development of better prevention, intervention and treatment responses.