I recently returned from the Philippines and had a bout with what I thought was a stomach virus, my Doctor prescribed Ciprofloxacin for any bacteria and another medication for the diarrhea. now the problem I'm having is my heart rate keeps going up when I stand or walk. At first it was thought that it was because I was dehydrated, but so far they haven't found anything else wrong. please help, this is scaring me and I can't get any answers.