Associations have also been found between marijuana use and other mental health problems, such as depression, anxiety, suicidal thoughts among adolescents, and personality
[web.archive.org]
More serious potential outcomes include depression with suicidal thoughts, as well as increased risk of relapse in an attempt to stave off unpleasant withdrawal symptoms.
[projectknow.com]
[…] disorder, suicidal thoughts and behaviours, and cannabis involvement in discordant twins: a retrospective cohort study, The Lancet Psychiatry, 4, 9, (706), (2017).
[doi.org]