I took azithromycin (one dose 1g) and since Ive taken it I haven't experience any side effects. My boyfriend and I took it at the same time and he has been experincing most side effects , he was nauseous at first and then had diarrhea late night, i assumed it had entered his system and worked on him. I Was curious why it wasnt affecting me like it did with him. Is it bad that I'm not feeling that way? Did it work on me ? Did my body reject it ? I haven't had no pain or nothing. Should I be worried ?