My husband can only eat a few bites at a time, then he feels very full and miserable. We have been to the er and had a cat scan, with no answers. I bought him some boosts, some times he can drink 4-5 swallows before feeling miserable, other times only 1-2. Our family Dr. put him on Zantac with no help, I have even tried peppermint oil in a diffuser and peppermint candy. Nothing is helping him. Any ideas what is wrong or how I can help him?