hello.have you ever been evaluated for your problem of 40 yrs?
i feel you should get yourself an opinion of a physician or a gastroenterologist.
one will also require to know any other drugs you are on other than pantocid
as there are common drugs like painkillers which lead to such symptoms.
appetite disturbances and excessive dizziness
also requires to be investigated and certain common disorders like hypothyroidism
needs to be ruled out.
so get yourself examined and evaluated in detail, that would help to come to conclusion and certainly solve your issues.
all the best.