I am glad that you have had biopsies that ruled out more serious
problems. Good that you don't have H.Pylori. Chronic gastritis
not always be associted with high acid in the stomach. Sometimes,
medications, even over the counter drugs such as ibuprofen
or even low dose aspirin
can cause damage to the lining of the stomach.
Dexilant is a delayed release form of Lansoprazole
which is effective
in controlling acid . I would recommend undergoing a pH monitor
testing when you are not on Dexilant to see if you have excess acid.
Make sure you are not deficient in vitamin B-12.
Wish you good health