Hi. Thanks for your query. Noted the history and understood your concerns. Excessive Advil can cause gastritis and GI disturbance like you have of gastritis, constipation and loss of appetite. I would advise you the following: Take laxatives like Cremaffin plus or Isapgol husk and see the results. If constipation is relived you will have automatic better appetite and thus feeling better too. Also change diet to normal one as before. Add green leafy vegetables, ladies finders and anything that gives you appetite, good feeling and normal stools. Continue a PPI like Omeprazole, antacids and probiotics. Avoid all the foods and beverages that are known to give you constipation or stomach trouble of any sort.