Drug Interaction Report

Magnesium Carbonate and Etidronate: Interaction Details

Name: Magnesium Carbonate and Etidronate Interaction
Creator: Dr. Brian Staiger, PharmD, BCPS

A pharmacist-reviewed analysis of the Magnesium Carbonate and Etidronate interaction: the documented clinical effects, severity rating, onset, mechanism, and management considerations, with cited references throughout.

AI-assisted, pharmacist-reviewed · Source data updated Aug 8, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature

Etidronate

Didronel®

Magnesium Carbonate

No brand names on record

Medically reviewed by

Dr. Brian Staiger, PharmD, BCPS

Updated Aug 8, 2026

Editorial policy · Data sources

Interaction severity

Minor

Usually limited clinical impact.

Minor

Moderate

Major

Contraindicated

How we grade severity & evidence

Severity levels

Contraindicated: These should generally not be used together.
Major: Potentially serious — often needs a change or close monitoring.
Moderate: Can be significant — usually manageable with monitoring.
Minor: Usually limited clinical impact.

Evidence grades

Established: Well documented — supported by controlled studies or strong clinical data.
Probable: Good supporting evidence, though not definitively proven.
Suspected: Some evidence suggests this interaction, but it is not well established.
Possible: Limited or conflicting evidence; the interaction may occur.
Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.

Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.

Of 53 documented Magnesium Carbonate interactions, 9 are rated minor — including this one.

Onset

rapid

Evidence

theoretical

Severity

Minor

What happens

Decreased etidronate absorption

Interaction Deep Dive

Antacids containing magnesium or aluminum may decrease the absorption of etidronate if taken concurrently. Their administration should be separated by at least two hours¹.

Why it happens (mechanism)

Intestinal binding of etidronate to multivalent cations

Common questions

Can I take Magnesium Carbonate and Etidronate together?

Decreased etidronate absorption Always confirm with your pharmacist or prescriber before making any change.

How serious is the Magnesium Carbonate and Etidronate interaction?

It is rated minor. Usually limited clinical impact.

How quickly could this interaction happen?

The documented onset is "rapid". Effects can appear quickly, often within about 24 hours of combining the drugs.

How strong is the evidence for this interaction?

The evidence is graded "theoretical". Predicted from the drugs' pharmacology; not yet confirmed in people.

Questions for your pharmacist

Does my dose of Magnesium Carbonate or Etidronate need adjusting while I take them together?
What symptoms should prompt me to call you or my prescriber right away?
Does the timing of my doses matter for this combination?
Is there anything you'd monitor while I'm on both?

References (1)

Product Information: Didronel(R), etidronate disodium. Procter & Gamble Pharmaceuticals, Inc. Cincinnati, OH, 1998.

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Etidronate

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All Etidronate interactions (12) Etidronate drug information

Magnesium Carbonate

Keep reading about Magnesium Carbonate

All Magnesium Carbonate interactions (53)

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HelloPharmacist doesn't license one of the big commercial interaction databases, so what you'll find here is not a complete list of every known drug interaction. Instead, each entry is researched, analyzed, and written up individually — documented from the published literature, reviewed by a pharmacist, and cited so you can check every source yourself.

If a combination isn't listed here, it means we haven't documented it yet — never that it's safe. For screening a full medication list, we recommend pairing this site with a comprehensive tool like the Drugs.com Interaction Checker and, most importantly, a review by your own pharmacist. For a deep, plain-English, fully sourced explanation of a specific documented interaction — that's exactly what we built this for.

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