My GP has just written me a script for Zelmac for colonic inertia. Has anyone with colonic inertia found Zelmac to be helpful? I doubt very much that I will be able to afford the drug anyway as it would cost me over 30dollars a week ie. with two tablets a day and on a disability pension this is out of the question but if I thought it was going to be a miracle cure maybe I could just live on bread and butter and take the drug. But I will probably just stay on the magnesium I have been taking which has its problems but is way better than suffering C.