Omnicef and ominicef

My son who is 11 years old who is allergic to pennicellian was perscribed Omnicef 300 mg twice a day for 10 days. On day number 8 he broke out in severe hives. I researched Omnicef and it is not recommended for people with allergic reactions to Ominicef.

My 12 month old granddaughter was given Ominicef for an ear infection. For two nights in a row she would wake up in the middle of the night crying, and unable to go back to sleep. Her playful attitude change to crankiness. She threw her toys, had crying fits and developed a diaper rash. A couple of days later I noticed blotches on her face which cleared up when the Omnicef was stopped. The Omnicef did not clear her ear infection. A week after taking the Ominicef she began wheezing and had difficult breathing. She was diagnosed with asthma, which I am now wondering could possibly have been brought on by the Omnicef?

Started taking Ominicef 300 mg. for upperrespitory infection
and Bronchitis on Dec 17,2005 dose 2 300mg tabs daily,
I developed extrime diaharea, which continued for 5 days, I was supposed to take this for 7 days, on the 5th day I developed an extemely sore throat which felt like a boil in my
throat, went back to the Dr. and had blood tests done I had
noticed a coffee ground effect coming from the stool, the test
showed that I was bleeding internaly and there was blood in the stool. The doctor had me stop taking it, I have just started to have normal looking stools, but this extreme reaction has
left me very weak,due to the extreme loss of fluid and blood

My son was pescribed ominicef for an ear infection after the first dose he had 2 loose (watery) clay brownish-red colored stools. He was very lethargic acting, not wanting to eat or drink, and his abdomen seem distended.

I have been having moderate dizziness. I started taking Ominicef six days ago. I am experiencing what appears to be diarrea. There was also an unexplained rash on my neck. The rash disappeared when I applied an appropriate cream to the area, but the other problems still exist.