Drug interactions
Ceftriaxone + Chloramphenicol
Severity: Moderate
Ceftriaxone and Chloramphenicol: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Chloramphenicol is bacteriostatic and may theoretically antagonize the bactericidal activity of ceftriaxone, which requires actively growing bacteria. Clinical evidence is limited, but it is relevant in severe infections such as meningitis.
What this interaction means in plain words
Ceftriaxone and Chloramphenicol can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Ceftriaxone belongs to Anti Bacterial; Chloramphenicol belongs to Anti Bacterial.
Why it happens
Pharmacodynamic antagonism: inhibition of bacterial protein synthesis reduces growth, which blunts cell-wall-active beta-lactam killing.
What to do
Avoid combining in serious infections where rapid bactericidal activity is needed, and choose agents based on susceptibility results. If both are used, monitor clinical response closely.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Ceftriaxone
- Calcium chloride + Ceftriaxone Contraindicated
- Calcium gluconate + Ceftriaxone Contraindicated
- Calcium + Ceftriaxone Contraindicated
- Ceftriaxone + Lactated ringer's Contraindicated
- Ceftriaxone + Ringer's solution Contraindicated
- Calcium acetate + Ceftriaxone Major
Other interactions of Chloramphenicol
Frequently asked questions
Can I take Ceftriaxone with Chloramphenicol?
MediHelp rates the interaction as moderate. Ceftriaxone and Chloramphenicol can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Chloramphenicol is bacteriostatic and may theoretically antagonize the bactericidal activity of ceftriaxone, which requires actively growing bacteria. Clinical evidence is limited, but it is relevant in severe infections such as meningitis.
How serious is the interaction between Ceftriaxone and Chloramphenicol?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid combining in serious infections where rapid bactericidal activity is needed, and choose agents based on susceptibility results. If both are used, monitor clinical response closely.
What other medicines interact with Ceftriaxone?
MediHelp also lists interactions of Ceftriaxone with, for example, Calcium chloride, Calcium gluconate, Calcium. The full list is on the Ceftriaxone page.
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