So today will mark my 2nd week on dxm and today I woke up very happy and talkative with people. I am confused because I am not like this normally. I heard that DXM has antidepressant properties. Is this possible? I take 30mg of dxm at morning and evening. Could this be building up causing the antidepressant effect? Whats the chances I can get serotonin syndrome from long term use?