Drug interactions
Calcium + Fleroxacin
Severity: Moderate
Calcium and Fleroxacin: 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
Oral calcium binds fluoroquinolones in the gut and lowers their absorption. This may reduce antibacterial effect and risk treatment failure.
What this interaction means in plain words
Calcium and Fleroxacin 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
Chelation of the fluoroquinolone by divalent calcium cations in the gastrointestinal tract.
What to do
Give fleroxacin at least 2 hours before or several hours after oral calcium products.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Calcium and Fleroxacin, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 14 days on the web. No card needed.
Other interactions of Calcium
- Calcium + Ceftriaxone Contraindicated
- Acalabrutinib + Calcium Moderate
- Alendronate + Calcium Moderate
- Atazanavir + Calcium Moderate
- Baloxavir marboxil + Calcium Moderate
- Bendroflumethiazide + Calcium Moderate
Frequently asked questions
Can I take Calcium with Fleroxacin?
MediHelp rates the interaction as moderate. Calcium and Fleroxacin 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. Oral calcium binds fluoroquinolones in the gut and lowers their absorption. This may reduce antibacterial effect and risk treatment failure.
How serious is the interaction between Calcium and Fleroxacin?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Give fleroxacin at least 2 hours before or several hours after oral calcium products.
What other medicines interact with Calcium?
MediHelp also lists interactions of Calcium with, for example, Ceftriaxone, Acalabrutinib, Alendronate. The full list is on the Calcium page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
