Drug interactions
Magnesium hydroxide + Minocycline
Severity: Moderate
Magnesium hydroxide and Minocycline: 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
Magnesium-containing antacids can bind oral minocycline in the gut and reduce its absorption. This may lower antibacterial effect, though the reduction is often less pronounced than with tetracycline.
What this interaction means in plain words
Magnesium hydroxide and Minocycline 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 hydroxide belongs to Gastrointestinal Tract; Minocycline belongs to Anti Bacterial.
Why it happens
Chelation of minocycline by magnesium cations in the gastrointestinal tract reduces absorption.
What to do
Separate minocycline from magnesium hydroxide by at least 2 hours before or 4 hours after. Avoid routine antacid use throughout the antibiotic course where possible.
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?
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Other interactions of Magnesium hydroxide
Other interactions of Minocycline
- Acitretin + Minocycline Contraindicated
- Isotretinoin + Minocycline Contraindicated
- Cholera vaccine + Minocycline Major
- Methoxyflurane + Minocycline Major
- Minocycline + Palovarotene Major
- Minocycline + Pexidartinib Major
Frequently asked questions
Can I take Magnesium hydroxide with Minocycline?
MediHelp rates the interaction as moderate. Magnesium hydroxide and Minocycline 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-containing antacids can bind oral minocycline in the gut and reduce its absorption. This may lower antibacterial effect, though the reduction is often less pronounced than with tetracycline.
How serious is the interaction between Magnesium hydroxide and Minocycline?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Separate minocycline from magnesium hydroxide by at least 2 hours before or 4 hours after. Avoid routine antacid use throughout the antibiotic course where possible.
What other medicines interact with Magnesium hydroxide?
MediHelp also lists interactions of Magnesium hydroxide with, for example, Ciprofloxacin, Dolutegravir, Gemifloxacin. The full list is on the Magnesium hydroxide page.
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