Knock on wood, mesalamine has been good to me too. (Not quite remission atm but promising improvements.) IIRC most of its effect is in the large intestine, so it generally works better for people with UC, but I'm the same in that my Crohn's is mostly colorectal.

Unlike you I haven't had nausea as a primary symptom though, knock on wood. It's weird/interesting how much variance there is between Crohn's patients... fast food destroys me, but then you hear about people whose safe food is McDonald's :P