Recently, my 12 month old son was prescribed Omnicef for what the...

Recently, my 12 month old son was prescribed Omnicef for what the Doctor thought was strep throat. Before the medication he had a steady temp of 102 and was very un-energetic. After five does of 1 TSP my son broke out in a horrible rash all over his face, torso/truck, and upper part of his arms and legs. He also got a diaper rash and diarrhea. He also was very bad tempered and moody. This was such a change from his past behavior, even when he was sick. The doctor thinks this is an allergic reaction to the mediation and put him on another antibiotic. I am very concerned about this medication and it's side effects. It seems that eveyone is experiencing some very serious things.