Azithromycin
"Took the 2 gram powder 2 hours after a meal and a little over an hour, I felt like I was going to die. I violently vomited, but the doctor told me that most of the medicine was already in my system and not to worry. He told me that feeling this terrible is actually quite common with this antibiotic, especially with this high dose. I actually had to return to the hospital where I got it because I wasn't sure what was going to happen to me. I'm on day 4 and these are the symptoms I am feeling: Constant upset GI tract, stomach along with acid reflux, feeling hot, mainly in the face, feeling a little more tired than usual. I'm not experiencing diarrhea, but each time I pass stool, it feels like it is going to be diarrhea."