I got light headed after eating lunch and in general did not feel well. I took a Pepcid and felt better after a while. This happens often, especially in the morning when I get breakfast ready and before eating. At times I have a sour taste in my mouth, but not always. Sometimes I feel light headed and not well when I try to walk especially if the weather is warn or hot. The Pepcid seems to help but not always. I am not eating gluten and dairy which seems to help also.