Drug interactions
Magnesium + Moxifloxacin
Severity: Moderate
Magnesium and Moxifloxacin: 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
Oral magnesium products can bind moxifloxacin in the intestine and decrease its absorption. Lower systemic antibiotic exposure may lead to therapeutic failure.
What this interaction means in plain words
Magnesium and Moxifloxacin 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.
Magnesium belongs to Gastrointestinal Tract; Moxifloxacin belongs to Anti Bacterial.
Why it happens
Magnesium cations chelate moxifloxacin in the gut, producing insoluble complexes that are poorly absorbed.
What to do
Take oral moxifloxacin at least 4 hours before or 8 hours after magnesium-containing products, per labeling. Consider a non-chelating alternative if separation is impractical.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Magnesium and Moxifloxacin, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 14 days on the web. No card needed.
Other interactions of Magnesium
- Ciprofloxacin + Magnesium Major
- Magnesium + Pancuronium Major
- Magnesium + Rocuronium Major
- Magnesium + Vecuronium Major
- Amikacin + Magnesium Moderate
- Amphotericin b deoxycholate + Magnesium Moderate
Other interactions of Moxifloxacin
- Amiodarone + Moxifloxacin Contraindicated
- Arsenic trioxide + Moxifloxacin Contraindicated
- Disopyramide + Moxifloxacin Contraindicated
- Dofetilide + Moxifloxacin Contraindicated
- Dronedarone + Moxifloxacin Contraindicated
- Droperidol + Moxifloxacin Contraindicated
Frequently asked questions
Can I take Magnesium with Moxifloxacin?
MediHelp rates the interaction as moderate. Magnesium and Moxifloxacin 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. Oral magnesium products can bind moxifloxacin in the intestine and decrease its absorption. Lower systemic antibiotic exposure may lead to therapeutic failure.
How serious is the interaction between Magnesium and Moxifloxacin?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Take oral moxifloxacin at least 4 hours before or 8 hours after magnesium-containing products, per labeling. Consider a non-chelating alternative if separation is impractical.
What other medicines interact with Magnesium?
MediHelp also lists interactions of Magnesium with, for example, Ciprofloxacin, Pancuronium, Rocuronium. The full list is on the Magnesium page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
