Calcium Carbonate and Ciprofloxacin: Drug Interaction Guide

Quick answer: This combination requires caution. Calcium Carbonate and Ciprofloxacin can be used together with adjustments and monitoring.

Interaction severity: Moderate — caution required

How Calcium Carbonate interacts with Ciprofloxacin

Divalent calcium cations chelate with the fluoroquinolone in the gut lumen, forming insoluble complexes that substantially reduce ciprofloxacin absorption and serum concentrations.

What you should do

Separate administration by at least 2 hours before or 6 hours after calcium-containing products, including dairy and antacids.

Key facts

Severity

Moderate — caution required

Mechanism

Divalent calcium cations chelate with the fluoroquinolone in the gut lumen, forming insoluble complexes that substantial...

Action

Separate administration by at least 2 hours before or 6 hours after calcium-containing products, including dairy and ant...

Important medical disclaimer: This page provides educational information about drug interactions for general reference. It is not a substitute for professional medical advice, diagnosis, or treatment. Always discuss your specific medications with a qualified healthcare provider before starting, stopping, or changing any treatment. About our editorial team.

Frequently asked questions

Can I take Calcium Carbonate and Ciprofloxacin together?

With caution. Separate administration by at least 2 hours before or 6 hours after calcium-containing products, including dairy and antacids.

What is the severity of this interaction?

The interaction between Calcium Carbonate and Ciprofloxacin is classified as Moderate — caution required. Divalent calcium cations chelate with the fluoroquinolone in the gut lumen, forming insoluble complexes that substantially reduce ciprofloxacin absorption and serum concentrations.

What should I do if I'm prescribed both?

Separate administration by at least 2 hours before or 6 hours after calcium-containing products, including dairy and antacids. Always consult your prescribing clinician — do not stop or change medications without medical guidance.

Last reviewed: by iMedic Medical Editorial Team. Our editorial process.