I was taking pain pills (many different types) for a muscle spasm in my back and got an "acid stomach" as a result. I was on a PPI for a month which worked and when I stopped, the acid stomach came back. I started taking Famotodine and after a few weeks, I was symptom-free!! I wonder if I could stop taking it now or do you think my acid stomach would come back? I have no side effects from the drug.