Cefixime Pediatric Dosing
The recommended dose of cefixime for pediatric patients 6 months or older is 8 mg/kg/day, administered either as a single daily dose or divided into two doses of 4 mg/kg every 12 hours. 1
Standard Dosing Regimen
The FDA-approved dosing is straightforward and weight-based:
- Total daily dose: 8 mg/kg/day
- Administration options:
- Once daily (8 mg/kg as single dose)
- Twice daily (4 mg/kg every 12 hours)
For children weighing >45 kg or ≥12 years old, use the adult dose of 400 mg daily. 1
Weight-Based Dosing Chart
The FDA label provides specific dosing by weight range 1:
| Weight (kg) | Daily Dose (mg) | Volume (100 mg/5 mL) | Volume (200 mg/5 mL) |
|---|---|---|---|
| 5-7.5 | 50 mg | 2.5 mL | — |
| 7.6-10 | 80 mg | 4 mL | 2 mL |
| 10.1-12.5 | 100 mg | 5 mL | 2.5 mL |
| 12.6-20.5 | 150 mg | 7.5 mL | 4 mL |
| 20.6-28 | 200 mg | 10 mL | 5 mL |
| 28.1-33 | 250 mg | 12.5 mL | 6 mL |
| 33.1-40 | 300 mg | 15 mL | 7.5 mL |
| 40.1-45 | 350 mg | 17.5 mL | 9 mL |
| >45 | 400 mg | 20 mL | 10 mL |
Important Clinical Considerations
Otitis Media Specific Guidance
For otitis media, the suspension formulation must be used—do not substitute tablets or capsules. 1 Clinical trials demonstrated that the suspension achieves higher peak blood levels than tablets at equivalent doses, which is critical for adequate middle ear penetration.
Duration of Therapy
- Streptococcus pyogenes infections: Minimum 10 days of treatment required 1
- Most other infections: Typically 5-7 days, though clinical response should guide duration
Renal Impairment
For pediatric patients with renal dysfunction, dose adjustment is necessary, though specific pediatric guidelines are not provided in the FDA label. The adult renal dosing suggests significant reduction is needed when creatinine clearance falls below 60 mL/min. 1
Alternative Cephalosporins in Pediatric Guidelines
While the question specifically asks about cefixime, it's worth noting that cefixime is listed as an alternative oral agent for β-lactamase-producing Haemophilus influenzae infections in the 2011 PIDS/IDSA pneumonia guidelines 2, alongside cefdinir, cefpodoxime, and ceftibuten. However, these guidelines emphasize that amoxicillin or amoxicillin-clavulanate are preferred first-line agents for most pediatric respiratory infections.
Common Pitfalls to Avoid
Concentration confusion: Cefixime suspension comes in two concentrations (100 mg/5 mL and 200 mg/5 mL). Always specify the concentration when prescribing in milliliters to prevent dosing errors. 1
Formulation substitution: Never substitute tablets/capsules for suspension when treating otitis media—the pharmacokinetics differ significantly. 1
Inadequate duration: Don't stop treatment prematurely for streptococcal infections; complete the full 10-day course to prevent rheumatic fever complications. 1
Storage after reconstitution: Once reconstituted, the suspension remains stable for only 14 days at room temperature or refrigerated. 1
Clinical Efficacy Data
Research studies support the 8 mg/kg/day dosing regimen, with cure rates of 93-100% reported for various pediatric infections including otitis media, respiratory tract infections, and urinary tract infections. 3, 4, 5 The twice-daily dosing schedule is most commonly used in clinical practice (54-60% of cases). 3