hello mr ..
would like to know few more details....age,do you smoke,take alcohol,food habits,duration of this problem..quit smoking alcohol,spicy foods,take lot of fluids healthy diet regularise food habits,donot lie down for atleast 2 hrs after food,,,
as said mebeverine lansoprazole
are of no use..i suggest you to continue medications and consult gastroenterologist
and get upper gi endoscopy usg abdomen and ct abdomen if required..
bye take care