Went to GP with some GERD-like symptoms: fullness after only eating small amounts or even after waking up in the AM not having eaten in hours, burping a lot, pressure, etc. He put me on Prilosec and Zantac which I've been taking for almost a month, did blood work, sent me to gastroenterologist. He immediately said it was IBS when I said once in awhile I have diarhea. He also put me on dicyclomine and I have an EGD in 3 weeks. This med causes headaches and makes me sleepy but doesn't relieve any of my symptoms. Any ideas? I only have the diarrhea only once or twice a week but the pressure in my chest and throat is the worst part. It's certainly not debilitating - just scary. One other possible connection I have run across is that I stopped taking Effexor about 3 months ago. That's about when I started having GI problems - just not as bad as it is now.