Dosing Recommendations. The recommended dose for cefdinir in children 6 months to 12 years of age is 7 mg/kg twice daily or 14 mg/kg once daily for 10 days. The 7 mg/kg twice daily regimen may be given for a shorter 5-day period in patients with acute bacterial otitis media or pharyngitis/tonsillitis.In adolescents and adults, the recommended dose is 300 mg twice daily for 10 days for community-acquired pneumonia or uncomplicated skin and skin structure infections.For acute maxillary sinusitis, a dose of either 300 mg twice daily or 600 mg once daily may be given for 10 days.he 7 mg/kg twice daily regimen may be given for a shorter 5-day period in patients with acute bacterial otitis media or pharyngitis/tonsillitis. In adolescents and adults, the recommended dose is 300 mg twice daily for 10 days for community-acquired pneumonia or uncomplicated skin and skin structure infections.