Lithium
"Turned me into a zombie and made me gain at least 60 pounds. Lithium completely numbed out my emotions until I could no longer function. I was on it for 3 years and nobody would take me off of it because I have adverse reactions to most mood stabilizers that could replace it and they viewed me having no moods at all as better than having symptomatic Borderline Personality Disorder. I barely have any memories from the time I was on lithium. I was eventually taken off it because it started driving me into rage."