Hi I am having bad stomach pains on my left side and now front of abdomin. I have been to the ER and they ruled out kidney stones, bladder infection, gall bladder, bladder infection. They also did some blood work and said everything looked fine with that but they did not know what causes my pain. I take the meds diclofenac, tramadol, gabapentin For a fall I had in Sept of last year. The ER doc gave me a pain med for my stomach pain and ranitidine which I have been taking the ranitidine for a while since about the last week of September for naseua from the other meds.