Cefdinir 300 mg was prescribed to me today. However, on the bottle it first states, may cause diarrhea.... . I understand that many antibiotics do so. However, the next warning states diarrhea may occur weeks to month s after taking drug . This is quite disturbing. My sister is still suffering problems from what they feel are long range symptoms from taking Cipro. I normally just take the medication prescribed, but I m not sure about something that can cause problems later.