Feeling Upset Stomach

My husband hasn't really been able to eat for about 3 weeks. It makes you weak when you don't eat right. They have tried everything to help him but to no avail. However, we found a Doctor who said to get a patch. You put it on their shoulder for 3 days and then change it and it supposed to take care of it. I am on my way now to go pick up the prescription. I sure hope it works.