I started to pass uric acid kidney stones about 5 weeks ago. I am still passing small orange stones. My Dr put me on Potassium Citrate 10 mg night and morning. Every night since I started taking this drug I have had sever leg cramps in the thighs, calves, ankles, feet and toes. The cramps only come at nights. I am not able to sleep and legs are very sore. I stopped taking the drug 2 days ago and last night I was able to sleep through the night with no cramps. Has anyone else experienced this?