sinusitis
"I saw my Dr for bad sinus infection. He prescribed cefdinir. I took the first one and within a short while was violently vomiting, sweating profusely, very weak. Called 911 to help get me off the floor into a chair to be wheeled to the car. Went to the emergency room. ER doc said nausea & vomiting due to the serious upper respiratory infection, but I see here it may have been the cefdinir. If any of the future doses make me sick, I'm going to ask for different antibiotic."