I Had An Endoscopy Done Earlier This Year And Was

I had an endoscopy done earlier this year and was diagnosed with IBS and prescribed protonix. Recently I have gained about 20 or so pounds after my psychiatrist took me off geodon and I've been suffering from depression. WIth that background information, my problem is that I have had A LOT of gas in the past few months. I mean A LOT. If I'm not belching I'm releasing HUGE farts all day long and its very embarrassing. I also take Lipitor, vitamin B complex, boswellia and gabapentin. What can or should I do about this gas?