hi--I take allegra d sometimes for allergies. the sudphed in it makes so very nervous!! I get insomina from it sometimes. anyways, I took it yesterday and today my colon is nuts. I think the side-effect of nervousness stresses out my intestines. I dont know what to take now. Im on nasonex and astelin. I wonder if these can cause gi probs as well. Im too afraid to go off these to find out!! let me know on this...art