Bipolar Disorde
"Possibly the worst mental med I&#039;ve ever taken, &amp; I&#039;ve taken many over the years.  It gave me an intense derealization side effect (only time I&#039;ve experienced this, &amp; it was unsettling as hell), and truly horrible, constant gas (as in, so bad I couldn&#039;t be in public)!  
Those who were brave enough to hold their breath &amp; be around me told me that my affect was pretty flat as well.  So basically it made me freaked out, flat, &amp; repulsive all at the same time: thumbs down."