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]
Lynskey MT, Glowinski AL, Todorov AA, Bucholz KK, Madden PA, Statham DJ, Martin NG, Heath AC: Major depressive disorder, suicidal ideation, and suicide attempt in twins discordant
[doi.org]