Lithium
"I have taken lithium since I was diagnosed with bipolar 1 in 1993. I stopped taking it for 10 years and then started taking it again and it's been 6 years back on it. I wouldn't substitute this medication. It works very well. The correct dosage is what matters most. The therapeutic window is 0.6 to 1.2 just because the level is slightly lower isn't always bad. It's alright to manage some of the symptoms but when it gets above 1.2 toxicity becomes an issue. It has to be maintained properly. My only drawback is occasional hand tremors and in high doses it tends to dull personality."