Quick answer

Ask your pharmacist or doctor before combining. The ciprofloxacin label and NIH document 3 minerals that lower the absorption of quinolone antibiotics: calcium, iron and magnesium. MedlinePlus repeats the warning for antacids and multivitamins. The sources word the schedule differently, so the spacing has to come from your pharmacist.^1,2,3,4

Key facts

The ciprofloxacin label says products containing calcium, iron or zinc reduce its absorption, multivitamins included.²
The same label lists magnesium and aluminum antacids among the products that lower ciprofloxacin absorption.⁵
NIH's calcium sheet names quinolone antibiotics among the medicines calcium supplements interact with.⁶
The ciprofloxacin label tells patients not to take it with dairy products or calcium-fortified juice alone.¹
MedlinePlus asks people taking ciprofloxacin to take antacids and multivitamins that contain minerals on a schedule apart from it.⁴

What are quinolone antibiotics, and why do minerals matter with them?

Quinolones, also called fluoroquinolones, are antibiotics for certain bacterial infections. MedlinePlus describes ciprofloxacin as a member of the group, and this page uses it as the example. Levofloxacin is the second quinolone that the labels in the sources name.^4,7

The ciprofloxacin label groups the minerals involved as multivalent cations and says products containing them lower how much of the antibiotic is absorbed. The minerals attach to the antibiotic in the gut, and less of it reaches the blood.⁸

What does the ciprofloxacin label say about calcium, iron and magnesium?

Calcium has the most detail. NIH's consumer sheet lists quinolones among the medicines calcium changes, and the label adds a point about food: the antibiotic should not be taken with dairy products or calcium-fortified juice alone.^1,6

Ask your pharmacist how far apart to take them

Calcium supplements taken close to quinolone antibiotics such as ciprofloxacin reduce how much of the antibiotic is absorbed. The ciprofloxacin label tells patients to keep calcium-containing products apart from it and not to take it with dairy or calcium-fortified juice alone.^1,6,9

On the medicine's label

The iron entry rests on the ciprofloxacin label alone. NIH's iron sheets do not mention quinolones, so the label is the source to ask about.²

Ask your pharmacist how far apart to take them

Iron can reduce the absorption of quinolone antibiotics such as ciprofloxacin. The ciprofloxacin label says products containing iron, calcium or zinc, multivitamins included, must be taken well apart from it, and sets out a schedule.²

On the medicine's label

For magnesium, NIH's health professional sheet names quinolone antibiotics and the label names magnesium and aluminum antacids. NIH's consumer sheet adds that magnesium is also in some laxatives and in products for heartburn and indigestion, so a supplement is not the only source.^3,5,10

Ask your pharmacist how far apart to take them

Magnesium can bind quinolone antibiotics such as ciprofloxacin and levofloxacin in the gut, so less of the antibiotic is absorbed. The ciprofloxacin label lists magnesium and aluminum antacids, multivitamins and other products with minerals such as calcium, iron or zinc among those that lower its absorption.^3,5

On the medicine's label

Do zinc, aluminum antacids and multivitamins count too?

The same label that names calcium, iron and magnesium also names zinc, and its patient information names a multivitamin as an example of a product that may keep the antibiotic from working correctly. The levofloxacin label points the same way, naming multivitamins with zinc, iron and similar metals, and antacids with magnesium or aluminum.^7,11,12

Zinc and multivitamins have their own entries on the antibiotics page, which also covers probiotics and vitamin K.

Why do the sources give different schedules?

NIH's calcium sheet and MedlinePlus's ciprofloxacin page do not word the schedule the same way, and the label sets out its own. The numbers live in those sources and not here, because the right schedule depends on the exact antibiotic and the exact product you use.^2,4,6

What does separate doses mean for these three entries?

All three entries are on the label, and all three carry the tag separate doses. That tag marks an official source that asks for the two products to be kept apart. It is not a schedule, and it is not a ban.

What should you ask your pharmacist about quinolones and supplements?

Is my antibiotic a quinolone such as ciprofloxacin or levofloxacin?
Which of my products contain calcium, iron, magnesium or zinc, including my multivitamin and any antacid?
What schedule applies to my antibiotic and to each of those products?
Does milk, yogurt or calcium-fortified juice change that schedule?
Does the schedule change if my course is long or I switch to another antibiotic?

Questions people ask

What vitamins should not be taken with quinolone antibiotics?

The sources name multivitamins that contain minerals such as calcium, iron, magnesium or zinc. For a vitamin without those minerals, the sources checked do not address it. That is not a finding either way, so ask your pharmacist.^7,12

Can I take calcium with ciprofloxacin?

NIH and the ciprofloxacin label say calcium supplements taken close to the antibiotic reduce how much is absorbed. Ask your pharmacist how to schedule them.^1,6

Does dairy matter with ciprofloxacin?

The label tells patients not to take ciprofloxacin with dairy products or calcium-fortified juice alone. Ask your pharmacist whether that applies to your doses.¹

Do multivitamins interfere with levofloxacin?

The levofloxacin label says multivitamins with zinc, metals such as iron, and antacids with magnesium or aluminum may interfere with its absorption. Ask your pharmacist about your product.⁷

What supplements interact with quinolone antibiotics?

Calcium, iron and magnesium are documented, and the labels also name zinc. Anything else is not addressed by the sources checked, which is not a finding either way, so ask your pharmacist.^2,3,6

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Sources

This page is information, not medical advice. Talk to your doctor or pharmacist about your own situation.