Most anyone except those with severe kidney failure should tolerate 1000 mgs of Magnesium every day.Even with higher doses (how much do you take every day?) most people can clear out the excess.Are you having heart problems, or a lot of vomiting? Hard to know if your symptoms fit if you won't discuss them.Hopefully it isn't that, or maybe they will consider you for a colon removal. It is drastic but some people's colons get to where they do need to come out and it is worth the risks from scarring and that. Do you know if your pelvic floor is OK? They usually want to check that before taking out the colon. If you can't release the stool it really doesn't matter how much or little colon you have.