I have a friend who is diabetic, takes metformin twice daily, insulin at night. Her blood checks are highly erratic, 400 s, back down to 150 s, back up, back down, etc. She is having constant nausea (no vomiting), making her feel terrible all the time. She had a scope done, Dr told her today stomach tissue normal, that it must be related to the diabetes. Any suggestions to help her?