My 5 year old son had a severe body rash after the last day of ...

My 5 year old son had a severe body rash after the last day of the omnicef treatment. His hands and feet swelled and the whole top layer of his skin on both hands and feet continue to peel as of today which is 3 weeks after he stopped taking the medication. He vomited while on it, had headaches, cried about everything and was a basically different kid. I will never use this medication again. I took him to 2 different doctors and they both would not admit to any of these things being and allergic reaction.