LIG thanks for that explanation. My DS was on Mylanta, then progressed to Zantec, then progressed to Losec and now is on Somac. I am not sure if its helping, but he is not sick anymore. Endoscopy show he still has red, inflamed spots and two ulcers in his small intenstine. Biopsy confirmed CMV virus in his small intestine... they are just keeping the acid controlled and will see if this has been rectified in 8 months time on its own.