Yes I too have back and leg cramps when I’m constipated. I do powdered psyllium husk instead of the Metamucil as my doctor said it’s the same without the chemicals. I do a drink mixture of it after breakfast and dinner. But when it’s really bad I also add after lunch. I really helps! Also ask your Dr what easy exercises you can do twice a day even if just for 10-15 min. It gets things moving. Also I can’t handle prunes but I like fresh pitted medjool dates. They are a sweet treat but easier on the gut than prunes. Ask your dr to recommend a nutrition specialist. Best of luck to you.