I've been on Omeprazole (Prilosec) for the better part of this year as I get acid reflux pretty much every day. I take 20 mg Omeprazole in the morning, 150 mg Ranitidine (Zantac) before lunch, I also take 4 or 5 Tums if I plan on going to the gym during my lunch break, then I take another 20 mg Omeprazole before dinner. My reflux is mostly under control with this regimen, I get some mild discomfort sometimes but it usually isn't worse than that. Going to the gym is the thing that flares up my reflux the most, my stomach doesn't seem to like it when I exercise. That's why I have to load up on Tums before I work out.
Sugarberry, no, I haven't noticed any increase in d since I've been on Omeprazole. I'm in remission and don't usually have d these days.