Unfortunately it's true that many owners seem to come back from the vet and say their birds are on antibiotics then that they are dead. This really worries me and I hope I never have to go through this. Antibiotics are very strong my husband just got off a course of them. He had a sore throat. I didn't go to the doctor and anyways the medication was counter indicated for cardiac patients. Nine times out of ten medication is counter indicated for me anyways.
These antibiotics say that they can do permanent heart damage. It doesn't seem worth treating a sore throat to get heart damage.