I'm also on Celexa, too. I would drink a lot and eat a lot as well. I never had a problem with getting sick while drinking until I got on Celexa.
That being said, the benefits of Celexa in my case have been great. I'd rather not be depressed and not have anxiety attacks, and Celexa seems to help. It even says on the bottle that I should avoid alcohol while taking the drug.