Drug interactions
Tetracycline + Trimagnesium
Severity: Moderate
Tetracycline and Trimagnesium: 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 salts bind oral tetracycline in the gut and reduce its absorption. This can lower antibiotic levels and cause treatment failure.
What this interaction means in plain words
Tetracycline and Trimagnesium 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.
Why it happens
Chelation of tetracycline by magnesium cations forming poorly absorbed complexes.
What to do
Give oral tetracycline at least 2 hours before or 6 hours after magnesium products, or use a non-chelating alternative.
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 Tetracycline
- Acitretin + Tetracycline Contraindicated
- Methoxyflurane + Tetracycline Contraindicated
- Isotretinoin + Tetracycline Major
- Palovarotene + Tetracycline Major
- Strontium ranelate + Tetracycline Major
- Tetracycline + Tretinoin Major
Frequently asked questions
Can I take Tetracycline with Trimagnesium?
MediHelp rates the interaction as moderate. Tetracycline and Trimagnesium 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 salts bind oral tetracycline in the gut and reduce its absorption. This can lower antibiotic levels and cause treatment failure.
How serious is the interaction between Tetracycline and Trimagnesium?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Give oral tetracycline at least 2 hours before or 6 hours after magnesium products, or use a non-chelating alternative.
What other medicines interact with Tetracycline?
MediHelp also lists interactions of Tetracycline with, for example, Acitretin, Methoxyflurane, Isotretinoin. The full list is on the Tetracycline page.
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