Antibiotic allergic reactions

Well we are back at the ER. Joel had a severe reaction to the antibiotics he started to. It happened so fast, I have never been so scared in my life. I had to call 911 and they took him straight to the ER. He had no clue he was allergic to them. Honestly it's the first time he's been on them since he was a kid. They are going to keep him over night to make sure he's ok