I have been on entocort for about 5 years and it really helped. My colonoscopy in January was so bad he thoughts he would have to remove my colon, however the last one in April looked much better.I went on medicare recently and the entocort would put me into the doughnut hole in a couple of months, so My doctor switched me to asacol samples, but I can't get passed the nausea. Question, will this go away after I'm on it for awhile, and does asacol contain sulfa drugs. I am allergic to sulfa.