I was diagnosed with gastritis by a specialist. the recommended medication (trustan 40mg) worked for a week afterwards i feel terrible pain. help!!!

Need evaluation: we need more data. If you are still having pain you need to seea gastroentereologist. Ask your physician to refer you;

R/O Peptic Ulcer Di: Gastritis is a pathological Dx, usually caused by Bacteria H.Pylori or NSAIDS causing Erosions or ulcer accounting for pain. Important note is that he responded to therapeutic dose of PPI for a week At this junture need diagnostic tests such as EGD for Dx, provided patient has not stopped the medication or not taking at right time ?