I've had triple bypass surgery within the last year, and had surgery caused by acid reflux two years ago, so have taken all the drugs you are taking, I'll bet, including Omeprazole. Your heart drugs have many more side effects than Omeprazole.
I'm guessing that during your surgery and consequent blood tests, it was determined you showed signifcant GERD problems, hence the Omeprazole
prescription. Like you were advised by boognell, I'd take it, and soon. I'd take it exactly as prescribed. The largest problem you might encounter taking it would be a small decrease in the efficiency of your cholesterol medications, but it's a throw-away reaction in my opinion.
I'd suggest you not eat anything after dinner, raise the head of your bed, avoid carbonated drinks, and see if that helps. Most importantly, take your Omeprazole exactly as prescribed.
Keep us informed.
Well, it may be for you. If I were you, I would continue taking it; much better than the alternative! Many people are sensitive to new things following major surgery nlike you had. Just follow your doc's orders, he sounds like a smart man. And take your meds. Good luck and God bless.