Make sure to drink plenty of water because Topomax can cause stones
- not just kidney stones
. And if you find yourself forming one, drink lemonade to acidify your system. Make it with real lemon juice and artificial sweetner to taste - the acid will keep the stones from forming. My doctor told me to drink my water with a lemon wedge or squeeze of lemon all the time, that way I'm sure to keep a little acid in my system.