what is cefdinir prescribed for
13 Reviews. 13 Reviews. Cefdinir is an antibiotic prescribed to treat a wide range of bacterial infections, including certain types of pneumonia, sinusitis, bronchitis, strep throat, sore throat, middle-ear infections, and certain skin infections.efdinir (Omnicef) Dosage. Cefdinir comes in 300 milligram (mg) capsules, and in a powder (125 or 250 mg) to be mixed with water. The total daily dose for all infections, except pneumonia and skin infections, is 600 mg, which can be taken twice a day in 300 mg doses, or in one 600 mg dose.