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]
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]