Cefuroxime Axetil: Clinical Overview
Cefuroxime axetil is a second-generation oral cephalosporin with broad-spectrum activity against common respiratory, urinary, and skin pathogens, indicated for community-acquired infections when beta-lactamase-producing organisms are suspected.
Indications
Cefuroxime axetil is recommended for:
Respiratory Tract Infections
- Acute bacterial sinusitis: First-line therapy for maxillary sinusitis 1, 2
- Community-acquired pneumonia: Effective as oral step-down therapy after initial IV treatment 3, 4, 5
- Acute otitis media: 250 mg twice daily in children (30 mg/kg/day in 2 divided doses, maximum 500 mg per dose) 3
- Pharyngitis/tonsillitis: Comparable efficacy to penicillin V 6, 7
- Acute exacerbations of chronic bronchitis: 250-500 mg twice daily 8
Other Infections
- Early Lyme disease: 500 mg twice daily for 14-21 days 9
- Urinary tract infections: 125-250 mg twice daily; highly effective due to renal excretion 10, 11
- Skin and soft tissue infections: 250-500 mg twice daily 12, 13
- Animal/human bite wounds: 500 mg twice daily as alternative to amoxicillin-clavulanate 12, 13
Dosing Regimens
Adults
- Standard dose: 250 mg twice daily for most infections 9, 1
- Severe infections/pneumonia: 500 mg twice daily 1, 2
- Uncomplicated UTI: 125 mg twice daily 14
- Gonorrhea: 1000 mg single dose 14
- Duration: 5-10 days for most infections; 5-day courses shown equally effective as 10-day courses for acute bronchitis and otitis media 8
Pediatric Dosing
- Standard: 30 mg/kg/day divided twice daily (maximum 500 mg per dose) 9, 3
- Severe infections: Up to 500 mg twice daily for children ≥12 years 3
- Oral suspension: Better absorption profile than tablets, covering MICs up to 1.0 mg/L 10
IV-to-Oral Sequential Therapy
For hospitalized patients with community-acquired pneumonia:
- IV cefuroxime 750 mg 2-3 times daily for 2-5 days
- Followed by oral cefuroxime axetil 500 mg twice daily for 3-8 days 6, 7
Contraindications
Absolute contraindication: Known allergy to cephalosporin antibiotics 15
Relative contraindications:
- Severe penicillin allergy (cross-reactivity risk)
- Severe renal impairment requires dose adjustment 15
Adverse Effects
Common (>1%)
- Gastrointestinal: Diarrhea/loose stools (8.6%), nausea/vomiting (2.6%) 15
- Taste disturbance: 5% in pediatric suspension 15
- Diaper rash: 3.4% in children 15
Important: Cefuroxime axetil causes significantly fewer GI adverse events than amoxicillin-clavulanate, particularly diarrhea (15-19% vs 37%) 8
Serious but Rare
- Hypersensitivity: Anaphylaxis, angioedema, Stevens-Johnson syndrome, toxic epidermal necrolysis 15
- Hematologic: Hemolytic anemia, thrombocytopenia, increased prothrombin time 15
- Hepatic: Hepatitis, cholestasis, jaundice 15
- Neurologic: Seizures (particularly with renal impairment and inadequate dose adjustment) 15
- Clostridium difficile colitis: Discontinue if severe diarrhea develops 15
Laboratory Abnormalities
- Positive direct Coombs' test
- Elevated liver enzymes
- Eosinophilia 15
Key Clinical Considerations
Spectrum of Activity
Cefuroxime is active against:
- Gram-positive: S. pneumoniae (including penicillin-intermediate strains), S. pyogenes, methicillin-sensitive S. aureus 6, 7
- Gram-negative: H. influenzae, M. catarrhalis (including beta-lactamase producers), E. coli, K. pneumoniae, P. mirabilis 6, 14
Limitations: Inactive against MRSA, Pseudomonas, enterococci, and highly penicillin-resistant S. pneumoniae (MIC ≥4 mg/L) 4
Pharmacokinetic/Pharmacodynamic Targets
- Time-dependent killing: Requires free drug concentration above MIC for 40-50% of dosing interval 16
- Tablet formulation: Achieves target for MICs up to 0.5 mg/L with 500 mg twice daily 10
- Suspension formulation: Superior absorption, covers MICs up to 1.0 mg/L 10
- Renal excretion: 100% PTA for UTI pathogens with MICs up to 8 mg/L 10
Common Pitfalls
- First-generation cephalosporins are NOT substitutes: Cephalexin lacks activity against H. influenzae and M. catarrhalis 9, 1
- Suspension palatability: Unpalatable taste causes 1.4% discontinuation in children; consider tablets when age-appropriate 1, 15
- Food enhances absorption: Administer with food to optimize bioavailability (68% absolute bioavailability) 14
- Renal dose adjustment required: Reduce dose by 50% if creatinine clearance <30 mL/min 15
Resistance Considerations
With evolving bacterial resistance patterns, cefuroxime axetil remains effective for empirical community-acquired infections when local susceptibility data support its use. Shorter 5-day courses are equally effective as 10-day courses for acute bronchitis and otitis media, potentially reducing selection pressure for resistance 8. For severe infections or when high-level resistance is documented, third-generation cephalosporins or fluoroquinolones may be required 1, 2, 4.