Gastritis is curable but it can take a long time for some. Diet is important and zantac would help some.
You should be tested for the Hpylori bug which causes ulcers and gastritis sometimes, as if you have that you need to get rid of it.
Also by taking natural supplements helps a great deal!!
Like a women with crohns disease (inflamation of the bowel) suffered for years and steriod meds didnt help alot but she took tumeric and her symtoms are practiacally gone now.
If you would like any help on supplements fot gastritis let me know