Lithium
"I have been taking lithium bicarbonate for a little over 2 years. My dosage has fluctuated because I am also medicated for manic depression. I am 37 and have been medicated, on and off, for depression since I was 18. Lithium seems to help with my bipolar symptoms, not so much for my depression. My side effects have been: increased thirst, tremors, weight loss & occasional stomach aches if I do not eat enough when I take my pills. I am fine with these so long as I feel 'normal.'  Frequent blood work is not bothersome as I understand they are screening for my own health...lithium toxicity levels, kidney functions, thyroid activity."