I have been having low blood sugar drops about 3 hours after I have eaten breakfast pretty consistently. My blood sugar drops to 41. Generally, my blood sugar when I wake up is between 112-117. My doctor is running a series of blood tests including C Pep and I have a sonogram scheduled in a couple of days. Is she checking for insulinoma? Do you know what else it could be? I also have MS and have been told that it is not related and that Tecfidera has not been shown to cause blood sugar drops.