Suggest Treatment For Stomach Upset And Nausea

i m a patient of spine tuber clusis i m takng medicn myrin p but now medicin is irritatng me oftionly my stomatch up set and i m feelng nossia and vomtng.this is my fifth month that i m takng medicine .now i can not oford myembitol ,so i m takng rifinai m feling heat in my body.i cant eat dont fel hunger.