I'm suprised that your cat is still on Cisapride. Does your Vet realize that they discontinued it?
I brought this concern up with both my regular vet and my holistic vet because they were both talking about putting Lexus on cisapride. But they both said it was taken off the shelf for humans not for pets. At this point I do not have to put her on cisapride but in the future I feel good to know that cisapride helps alot! There were no adverse effects on Pets (thank goodness). It sounds like cisapride has been a life saver for many people with cats that have megacolon.