Drug interactions
Doxycycline + Polysaccharide iron
Severity: Moderate
Doxycycline and Polysaccharide iron: 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 iron binds doxycycline in the gut, reducing its absorption and possibly causing treatment failure. The effect is smaller than with older tetracyclines but still relevant.
What this interaction means in plain words
Doxycycline and Polysaccharide iron 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 doxycycline by iron in the gastrointestinal tract, reducing absorption.
What to do
Give doxycycline at least 2 hours before or 3 hours after oral iron.
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 Doxycycline
- Acitretin + Doxycycline Contraindicated
- Aminolevulinic acid + Doxycycline Major
- Cholera vaccine + Doxycycline Major
- Doxycycline + Isotretinoin Major
- Doxycycline + Methoxyflurane Major
- Doxycycline + Microbiota Major
Frequently asked questions
Can I take Doxycycline with Polysaccharide iron?
MediHelp rates the interaction as moderate. Doxycycline and Polysaccharide iron 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 iron binds doxycycline in the gut, reducing its absorption and possibly causing treatment failure. The effect is smaller than with older tetracyclines but still relevant.
How serious is the interaction between Doxycycline and Polysaccharide iron?
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 doxycycline at least 2 hours before or 3 hours after oral iron.
What other medicines interact with Doxycycline?
MediHelp also lists interactions of Doxycycline with, for example, Acitretin, Aminolevulinic acid, Cholera vaccine. The full list is on the Doxycycline page.
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