Cefdinir Dosing for Pediatric Patients
For children aged 6 months to 12 years, administer cefdinir 14 mg/kg/day (maximum 600 mg/day), which can be given either as 7 mg/kg every 12 hours OR as a single 14 mg/kg once-daily dose, depending on the infection type. 1
Dosing by Indication
For Most Infections (Otitis Media, Sinusitis, Pharyngitis/Tonsillitis):
- 7 mg/kg every 12 hours for 5-10 days, OR
- 14 mg/kg once daily for 10 days
- Maximum daily dose: 600 mg 1
Important caveat: Once-daily dosing has been specifically studied and proven effective for otitis media, sinusitis, and pharyngitis 1. The once-daily regimen improves adherence and has demonstrated equivalent efficacy to twice-daily dosing in clinical trials 2, 3.
For Skin and Skin Structure Infections:
- 7 mg/kg every 12 hours for 10 days ONLY
- Once-daily dosing has NOT been studied for skin infections and should not be used 1
Practical Dosing Chart (from FDA Label)
| Weight | 125 mg/5 mL suspension | 250 mg/5 mL suspension |
|---|---|---|
| 9 kg (20 lbs) | 2.5 mL q12h or 5 mL q24h | Use 125 mg/5 mL product |
| 18 kg (40 lbs) | 5 mL q12h or 10 mL q24h | 2.5 mL q12h or 5 mL q24h |
| 27 kg (60 lbs) | 7.5 mL q12h or 15 mL q24h | 3.75 mL q12h or 7.5 mL q24h |
| 36 kg (80 lbs) | 10 mL q12h or 20 mL q24h | 5 mL q12h or 10 mL q24h |
| ≥43 kg (95 lbs) | 12 mL q12h or 24 mL q24h | 6 mL q12h or 12 mL q24h |
Adolescents ≥12 Years
For adolescents who weigh ≥43 kg, use adult dosing: 300 mg every 12 hours OR 600 mg once daily (maximum 600 mg/day) 1. The choice between once and twice-daily dosing follows the same infection-specific guidelines as younger children.
Special Populations
Renal Insufficiency:
- Creatinine clearance <30 mL/min/1.73 m²: Reduce to 7 mg/kg (up to 300 mg) once daily 1
Hemodialysis:
- 300 mg or 7 mg/kg every other day
- Give an additional dose (300 mg or 7 mg/kg) after each dialysis session 1
Critical Clinical Context
Cefdinir is listed as an alternative agent for β-lactamase-producing Haemophilus influenzae infections in the 2011 IDSA/PIDS pneumonia guidelines 4, but it is NOT a preferred first-line agent for most respiratory infections. The guidelines favor amoxicillin or amoxicillin-clavulanate as preferred agents.
Important Limitations:
- Cefdinir should NOT be used for urinary tract infections - recent evidence shows nearly twice the treatment failure rate compared to cephalexin (23.4% vs 12.5%, P=0.006), with higher rates of cephalosporin-resistant pathogens on repeat culture 5
- Cefdinir has low bioavailability (16-25%) and poor urinary penetration 1
- A 2020 study found 57% of pediatric cefdinir prescriptions were potentially inappropriate, with higher rates in emergency/urgent care settings 6