cefdinir should be "out of your system" in a day or so. relatively fast but that does not mean your diarrhea (assuming it was caused by this antibiotic) will immediately stop.
how long does it take antibiotics to flush from your system after you stop taking. when taking cefdinir 300 mg for a sinus infection i developed diarrhea and can't seem to stop it. nurse line said to stop taking and it would take some time to get it out of my system. how long is that time?