hi doc i have pain in my upper abdomen, nausea and heavy head. i have done endoscopy,ct scan abdomen,brain mra scan,got my eye test, went to ENT, but everything is normal. i have used nexium tab twice a day, then razo D,then nexpro 40 and now pantosec. out of four medicine pantosec 40 is little effective . could u help me with the dosage?