I had earlier taken medicine for h-pylori (14 day course) around 6 years back. My problem of gas in stomach is not solved. I have taken pentaprazole for many years and it is of no use. Because of gas i get severe headache, body ache, sore throat. I am also diagnosed with vitamin B 12 , Folic acid and Vitamin D deficiency. I have taken injections for these, but my gas problem,headache, body pain, and sore throat problem is not solved. Now i have been prescribed Nexpro RD 20 for 15 days. What could be the root cause and how to cure it.