C. diff Risk


Oral Bioavailability


Approximate Cost


Spectrum Of Activity


Renally cleared, requires dosage adjustment with changes in renal function. Consult a pharmacist for renal dosing.

Max: 2g/dose, 12g/day

Meningitis: IV/IM 200-300mg/kg/DAY divided q6h

IV/IM 100-200mg/kg/DAY divided q6-8h

General Information

Common Usage

Empiric therapy for bacterial meningitis, pneumonia, intra-abdominal infection including SBP, musculoskeletal i.e. septic arthritis, and urinary tract infection.

Adverse Effects

Rash, localized phlebitis at injection site, allergy.

Positive Coombs test, neutropenia, diarrhea.

Additional Information

Preferred cephalosporin in neonates.

Outside of the neonatal period, cefotaxime may be automatically substituted by AHS pharmacy to ceftriaxone unless "no substitution" is specified.


Antimicrobial class: 3rd Generation Cephalosporin

Average serum half life:

  • neonates: 3.4-4.6 hours.

  • children: 1.5 hours

Route of Elimination: urine: ~60% as unchanged drug and metabolites in urine