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Cefdinir is an antibiotic used to treat various bacterial infections. It belongs to the class of antibiotics known as cephalosporins. Cefdinir is commonly prescribed to combat infections caused by bacteria, such as respiratory tract infections, ear infections, skin infections, and urinary tract infections. The usual dosage of Cefdinir is 300 mg taken orally, typically once or twice a day, as directed by a healthcare professional. The specific dosage and duration of treatment may vary depending on the type and severity of the infection.