just wanted to comment as someone who is bipolar with a BMI of 22 - I take lamictal (which from what I understand is the most common prescribed med for bipolar) and one of the side effects is actually weight LOSS. however, I've read some studies that say obesity is common amongst those with bipolar... but IMO it'd be hard to prove correlation vs. causation considering the majority of the population are obeasts to begin with, you know?