Penicillin Reaction

Halle had a reaction to Amoxicillin. She is covered from head to toe in hives. She is quite itchy. Megan Brinkerhoff's little girl and Teri Feltners child also had a reaction to the same medicine. Does anyone else besides Megan and I think that this is wierd to have these three kids have reactions like this within a week of each other. Maybe a bad batch of Amoxicillin. Who knows. I personally think it is very strange!