Metronidazole
"I returned from India and started having terrible diarrhea within a few days. It continued for two weeks before I went to the doctor. I lost 14 pounds in two weeks. The doctor also gave me cipro. Within 12 hours my diarrhea stopped and I started to feel better. To me this is a miracle drug. I am not sure how must longer I could have gone without being admitted to the hospital."