I wound up in the ER with atrial fibrillation late last July due to dehydration. Scared the snot out of me. Ever since then I make sure to drink 64 oz of water everyday in addition to all my normal liquids. It took about a month to get my electrolyte balance to settle down once I first started doing it. When you have been living in partially dehydrated state, your body doesn't like all that extra water at first and tries to get rid of it constantly. It eventually gets the osmotic balance adjusted and everything goes back to normal.