Powerade Zero is a sugar-free kind of electrolyte drink with zero carbs that my doctor recommended to me, and it helps with the potassium/sodium balance tremendously!

Also Whofan, I used to get those same leg cramps! My toes actually curl into the bottoms of my feet and the cramps go all the way to my hips. My doctor prescribed me Klonopin to take before bedtime with the Powerade Zero and I haven't had one since. Might want to ask your doctor about it.