@unicorn and Terri Azithromycin was the only one I responded to after the testing also. But it was the one that damaged my hearing. I recall it as a small pink pill, easy to take. I had no other side effects than the hearing loss. That is mentioned in the list of rare side effects. I wish I had been able to stay on it because I had no problems with it other than that big one and I felt a lot better on it. The scary part was that it was not a slow loss.it seemed to happen in a day...and that was my doctor's clue to get me off it immediately.