I've been taking 900mg since 2000. I do find myself constantly drinking liquids. If I'm having a difficult time I notice a very small hand tremor that goes away when things are more in control. I know my hair and skin are dryer, but that could also be because I live in a very dry climate. Just keep an eye on your body and how it reacts to the Lithium. Make sure you keep an eye on your blood work to ensure you are not damaging your thyroid, and always talk to your doctor. Good luck!