Not had a blockage. Dr told me drink to pee. Using the online no no list. I figured out artificial sweetener made for stones within hours. Sugar only now. I've gotten to the point of reduced sugar, that if I get a sweet tea. I cut it by half with water and it still taste sweet. I keep lemon juice and lemons around. Don't know if that is wives tale. Good reason to make the effort for lemonade. I figure my day is coming.