I was diagnosed with MSK approx. 15 years ago. The rate of passing stones has increased greatly over the past 5-6 years. I am taking detrol, celexa, hctz, and fenofibrate. I drink 1-2 cans of diet coke/day and drink approx. 4-8oz. glasses of crystal light lemonade/day. I have not been following a special diet. I am asking if I should be taking Detrol, drinking crystal light and if I should be on a special diet. I am aware that I have approx. 10-12 stones in both kidneys. How do I stop new stones from forming? I am 46 1/2 years old and along with my husband, I am tired of cystos, running to the ER late at night, stents and pain medicine.