Drug interactions
Calcium acetate + Ciprofloxacin
Severity: Moderate
Calcium acetate and Ciprofloxacin: 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
Calcium ions bind oral ciprofloxacin in the gut and markedly reduce how much is absorbed. This can lower antibiotic concentrations enough to cause treatment failure and promote resistance.
What this interaction means in plain words
Calcium acetate and Ciprofloxacin 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.
Calcium acetate belongs to Genitourinary; Ciprofloxacin belongs to Anti Bacterial.
Why it happens
Chelation of ciprofloxacin by divalent calcium in the gastrointestinal tract forms poorly absorbed complexes.
What to do
Give oral ciprofloxacin at least 2 hours before or 6 hours after calcium acetate. If calcium binders are needed with meals, schedule ciprofloxacin away from those doses.
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 Ciprofloxacin
- Agomelatine + Ciprofloxacin Contraindicated
- Ciprofloxacin + Fezolinetant Contraindicated
- Ciprofloxacin + Thioridazine Contraindicated
- Ciprofloxacin + Tizanidine Contraindicated
- Ciprofloxacin + Vandetanib Contraindicated
- Alosetron + Ciprofloxacin Major
Other interactions of Calcium acetate
Frequently asked questions
Can I take Calcium acetate with Ciprofloxacin?
MediHelp rates the interaction as moderate. Calcium acetate and Ciprofloxacin 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. Calcium ions bind oral ciprofloxacin in the gut and markedly reduce how much is absorbed. This can lower antibiotic concentrations enough to cause treatment failure and promote resistance.
How serious is the interaction between Calcium acetate and Ciprofloxacin?
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 oral ciprofloxacin at least 2 hours before or 6 hours after calcium acetate. If calcium binders are needed with meals, schedule ciprofloxacin away from those doses.
What other medicines interact with Ciprofloxacin?
MediHelp also lists interactions of Ciprofloxacin with, for example, Agomelatine, Fezolinetant, Thioridazine. The full list is on the Ciprofloxacin page.
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