If it is a calcium based binder and given the name, it sounds as if it is, you can take too many. If the phosphate doesn't bind with all of the binder you can elevate your calcium. I tend to guage mine by whether it is a high phosphate snack or not.
I've replaced binders with TUMS or store brand TUMS. My labs have all been good since I switched, and they cost less than binders. They also taste a lot better.
Yea i dint like them much. The problem i have is figuring out how many for what food. My phosphate had been Ive 7 for a very long time it never been lower. Last month they started me a a drug called sensipar my level dropped to 4.9. They were but i also now consider my binders and another food group like grain and fruits. But thy draw on tuesday next week and we will see where it ends up.