I am on VenlorXR 150mg, because I suffered from depression as long as I can remember. I was on other antidepressants as well and have been on it about 10 years in total. The Venlor is my 2nd year. Is is possible to have bipolar disorder while I am on medication. Sometimes I am very happy, energetic and feel real good. Other times I am low, lethargic and just feel sad and very moody. There is times when I can not seem to sleep, like an episode of 2 weeks or so. I was never like this, just depressed, when I was on no medication, so I don't really mind. Should I ask my doc about a mood stabilizer or is this normal?