I was sick with a nasty stomach flu about
a year ago and threw up some of my Asacol whole. I hadn't taken any since that morning and I threw them up at night. Kinda hurt coming back up! They would come out whole, since the meds aren't released until they reach your colon, and you aren't throwing up stuff once it reaches that point (hopefully).
I hope you feel better soon!
Edit: I just read your second post. So, what did the ER docs think it might be if it's not a flu bug?