Ceftriaxone Has No Oral Formulation
Ceftriaxone is not available in an oral formulation and cannot be administered orally. This is a parenteral-only antibiotic that must be given either intravenously (IV) or intramuscularly (IM) 1.
Why This Matters
The FDA drug label explicitly states that ceftriaxone is available only as a sterile powder for reconstitution for IV or IM administration 1. All dosing guidelines across multiple conditions—from neonatal sepsis to gonorrhea to meningitis—specify either IV or IM routes exclusively 2, 3, 4.
Common Clinical Scenarios and Actual Routes
For Pediatric Infections:
- Neonates (≤7 days): 50 mg/kg IV/IM every 24 hours 2
- Infants and children: 50-75 mg/kg IV/IM divided every 12-24 hours (max 2 g/day for most infections) 2, 3
- Meningitis in children: 100 mg/kg IV once daily or divided every 12 hours (max 4 g/day) 3, 1
For Adults:
- Standard dosing: 1-2 g IV/IM once daily or divided every 12 hours 1
- Gonorrhea: 250 mg IM single dose 5, 6
- Severe infections: Up to 4 g/day IV 1
If You Need an Oral Cephalosporin
When oral therapy is appropriate, consider these alternatives based on the clinical scenario:
For UTI in infants >28 days: Cephalexin 50-100 mg/kg/day in 4 doses OR cefixime 8 mg/kg/day in 1 dose 3
For gonorrhea: Cefixime 400 mg orally as a single dose (though less preferred than IM ceftriaxone) 7
For community-acquired infections: Cefuroxime axetil, cefpodoxime, or cefixime depending on the specific indication 4
Critical Pitfall to Avoid
Do not attempt to administer ceftriaxone orally or prescribe it as an oral medication. The drug has poor oral bioavailability and is formulated exclusively for parenteral use. If a patient requires oral therapy, you must switch to a different antibiotic entirely—this is not a route-of-administration choice but rather a different drug selection 1.