I guess altogether about 6 years.

First time at 1,200 mg for about six months. I was taken off because of thyroid damage. Then they put me back on it a few years later, despite hypothyroidism (Synthroid dose went up and up). The second time was about 5 1/2 years on 900 mg. I was taken off primarily because of high creatinine level, but Lithium was not doing much, anyway. My doctor weaned me off the Lithium, little by little. My moods and general quality of life only improved. My cloudy thinking and cystic acne cleared up, my hair quality improved, the polyuria/polydipsia and hand tremors eased, my physical balance was restored (could kneel without falling), etc.

Obviously I HAD to go off Lithium and didn't miss it. I suppose if it was a miracle drug for me, it would have been sad.