DS' bronch came back with a bacteria, which I can't remember the name of right now, and showed inflammation in the right lower lobe. His sinus CT scan showed that his sinuses are a mess, he was diagnosed with chronic sinusitis and has air-fluid level in his right mastoid? His pulmo prescribed a 21 day course of Augmentin. Within a week, his chronic cough had stopped and I was so happy, but... then he developed hives and we took him to the doc and were told to stop the Augmentin immediately and they started him on Prednisone and Benadryl. He looked better the next day, but the day after that he woke up with his face and neck horribly swollen. His right eye was completely swollen shut and the left was nearly. We rushed him to the ER where they started IV steroids and admitted him to the PICU. By the next morning he was nearly completely recovered, phew! We continued the Prednisone for a few days and he's been fine. Tomorrow we go to the Pediatric Allergist to find out if this is an allergic reaction or a "serum sickness". Has anyone else experienced this with Augmentin or any other antibiotic?