Can i use cefdinir for my sinus infection and what is the mg dosage for the liquid?

All meds should be used as prescribed and have clear instructions printed on the vial. Cefdinir comes in 125mg/5ml or 250mg/5 ml solutions with the most common dose used for adults being 300 mg or 6 ml of the 250/5 solution twice a day. If having leftover antibiotics and thinking of using for yourself or a loved one for self diagnosed conditions have it first checked by the local pharmacist.