http://www.medications.com/effect/view/32017 (33yr) Was given Omnicef for an ear infection. After 3rd dose broke out with huge patches of red whelps. Stop taking, but then my joints started to ache and I had large knots on the bottom of my feet and hands. Diarrhea and vomiting, severe stomache cramps Sun, 06 Jul 2008 15:50:20 -0400 http://www.medications.com/effect/view/32017?item=9830 I took Omnicef for 4 or 5 days and felt so very sick with stomach ache and extreme weakness, dizziness and a state of confusion. I think my blood pressure plumpeted, but at the time I didn't have the presence of mind to take my blood pressure. I really f http://www.medications.com/effect/view/32017?item=9830