I've stopped plavix twice now after a year, my Doctor insists there is no evidence to suggest any benefits after a year. I was also on Omeprazole with Plavix both times. My Doc said the evidence is weak, and if it does reduce the effects of plavix, then it's only slight. Until more conclusive studies are done, who knows.
You seems to have make your investigation... theoretically Pantoprazole has less interaction with plavix... however let me tell you my experience/info...
1) In Spain, we only take plavix por about 1 year after stents. So at least according with some trends, you could already stop it, or cancel its effects without problems.
2) My Cardiologist did not allowed me to take Omeprazole while I was on Plavix... What your cardiologist thinks?
3) PPIs either Pantoprazole or Omeprazole, at least in Spain, are supposed to be used for SHORT treatment (4-6 weeks) of very SPECIFICS diseases.
4) PPIs have quit a number of side effects when used for long term: No assimilation of Calcium, Vitamin Bs, Magnesium (which can affect your heart), increased broken hips...
In summary, I would not worry for the interaction with Plavix, since probably you no longer need it, I would be very worry for taking them without a clear diagnostic or reason.
If you have got a gastroscopy and they did not see the reason of your pain, chances are that you will get nothing from PPIs.
If you have not got the gastroscopy, I would get it before going on PPIs for life.
In the other hand, I am surprised that you are not on statins, in fact those gave me the same symptoms that you describe until I realized that were gases produced by them. Any OTC pill to reduce the gases solved my problem.
Are you taking any supplements? some like Taurine, COQ10, Omega-3.. can produce awful stomach problems
Jesus