Ceftriaxone Dosage for Endocarditis
Dosage Recommendations by Pathogen and Situation
- The European Society of Cardiology recommends a dosage of 2 g/24 h intravenously as a single dose for the treatment of endocarditis 1, 2, 3
- For penicillin-susceptible streptococcal endocarditis, the recommended dosage is 2 g/day intravenously or intramuscularly as a single dose for 4 weeks for native valve endocarditis and 6 weeks for prosthetic valve endocarditis 4, 5
- For streptococcal endocarditis with relative penicillin resistance, the recommended dosage is 2 g/day intravenously or intramuscularly as a single dose for 4 weeks, combined with gentamicin 3 mg/kg/day intravenously or intramuscularly as a single dose for 2 weeks 5
Empiric Therapy before Pathogen Identification
- The European Society of Cardiology does not recommend ceftriaxone as the primary option for empiric initial therapy of endocarditis, instead recommending ampicillin 12 g/day intravenously in 4-6 doses plus gentamicin 3 mg/kg/day intravenously or intramuscularly as a single dose 1, 2, 4, 8
Special Considerations
- Ceftriaxone is suitable for outpatient parenteral antibiotic therapy due to its once-daily dosing 7, 8
- The dosage should be adjusted in patients with impaired renal function 5
- In patients with penicillin allergy, ceftriaxone should be used with caution due to possible cross-reactions, and vancomycin may be an alternative 5