Can I take Calcium and Ciprofloxacin together?
Drug interaction guide
Originally published 25 Jan 2026
Meets Patient’s editorial guidelines
- DownloadDownload
- Share
- Language
- Discussion
Taking calcium at the same time as ciprofloxacin can significantly reduce the amount of the antibiotic that gets into your bloodstream. This means the medicine may not work properly to clear your infection.
In this article:
Continue reading below
Why this happens
Calcium binds to the ciprofloxacin in your stomach or gut, forming a 'complex' that is too large for your body to absorb. Instead of entering your blood, the medicine simply passes through your system.
What you should do
Do not take calcium supplements, antacids containing calcium, or large amounts of dairy products at the same time as ciprofloxacin. You should take ciprofloxacin at least 2 hours before or 6 hours after taking any calcium-containing products.
Continue reading below
Using other medicines
Taking multiple medicines? Our Medicines Interaction Checker helps you check whether your prescriptions, over-the-counter medicines, and supplements are safe to take together. Simply search for your medicines to see potential interactions and what to do about them.
Disclaimer
This information is for general educational purposes only and should not be relied upon as a substitute for professional medical advice. Always consult your GP, pharmacist, or another qualified healthcare professional before making decisions about your medications. Individual circumstances may vary, and only a healthcare professional who knows your medical history can provide personalised guidance.
Patient picks for Drug interactions
Treatment and medication
Can I take Evana heavy period relief and Mefenamic acid together?
Taking these two medicines together significantly increases your risk of serious stomach problems, such as stomach ulcers, bleeding, or irritation of the stomach lining. It can also put extra strain on your kidneys.
Treatment and medication
Can I take Maitake and Shiitake together?
Taking maitake and shiitake mushrooms together may increase the risk of bruising or bleeding. Both mushrooms contain natural compounds that can thin the blood and slow down the clotting process. While they are commonly eaten together in food, taking them in concentrated supplement form increases this effect.
Article history
The information on this page is written and peer reviewed by qualified clinicians.
25 Jan 2026 | Originally published
Ask, share, connect.
Browse discussions, ask questions, and share experiences across hundreds of health topics.
Feeling unwell?
Assess your symptoms online for free
Sign up to the Patient newsletter
Your weekly dose of clear, trustworthy health advice - written to help you feel informed, confident and in control.
By subscribing you accept our Privacy Policy. You can unsubscribe at any time. We never sell your data.