Drug interactions
Calcium citrate + Ceftriaxone
Severity: Moderate
Calcium citrate and Ceftriaxone: 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
Ceftriaxone forms insoluble precipitates with calcium, which has caused fatal lung and kidney deposits in neonates given IV calcium. Oral calcium citrate supplements have negligible systemic exposure to this risk, so the concern applies mainly to IV calcium products.
What this interaction means in plain words
Calcium citrate and Ceftriaxone 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.
Why it happens
Ceftriaxone binds calcium to form insoluble calcium-ceftriaxone salt, relevant mainly when calcium is given intravenously.
What to do
Oral calcium citrate does not need to be withheld, but avoid IV calcium products in neonates receiving ceftriaxone. If IV calcium is needed in others, give sequentially with thorough line flushing.
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
Frequently asked questions
Can I take Calcium citrate with Ceftriaxone?
MediHelp rates the interaction as moderate. Calcium citrate and Ceftriaxone 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 forms insoluble precipitates with calcium, which has caused fatal lung and kidney deposits in neonates given IV calcium. Oral calcium citrate supplements have negligible systemic exposure to this risk, so the concern applies mainly to IV calcium products.
How serious is the interaction between Calcium citrate and Ceftriaxone?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Oral calcium citrate does not need to be withheld, but avoid IV calcium products in neonates receiving ceftriaxone. If IV calcium is needed in others, give sequentially with thorough line flushing.
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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