I have been taking Zonegran for a while now. I am not having any problems so far, but I am taking 300mg/day and I really do not want kidney stones. I am trying to drink a lot of water, and also I have dry mouth from my Lamictal, but now, well, now I have to take a bathroom break all the time. How much water are other Zonegran people drinking, and how much is "a lot", which is all the advice I am getting. Also I get sick-feeling if I drink over 85oz - how do you balance that out? Yes I drink coffee, but I have cut back. And I almost never drink soda.