Drug interactions
Doxycycline + Polycarbophil
Severity: Moderate
Doxycycline and Polycarbophil: 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
Polycarbophil is a bulk-forming agent that contains calcium in its calcium salt form and can bind other drugs in the gut. This may reduce oral doxycycline absorption and weaken antibacterial effect.
What this interaction means in plain words
Doxycycline and Polycarbophil 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.
Doxycycline belongs to Anti Bacterial; Polycarbophil belongs to Gastrointestinal Tract.
Why it happens
Binding or chelation of doxycycline in the gastrointestinal tract by polycarbophil, especially calcium polycarbophil, reduces absorption.
What to do
Give doxycycline at least 2 hours before or several hours after polycarbophil. Monitor clinical response to the antibiotic.
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 Polycarbophil
- Demeclocycline + Polycarbophil Moderate
- Minocycline + Polycarbophil Moderate
- Oxytetracycline + Polycarbophil Moderate
- Polycarbophil + Tetracycline Moderate
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 Polycarbophil?
MediHelp rates the interaction as moderate. Doxycycline and Polycarbophil 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. Polycarbophil is a bulk-forming agent that contains calcium in its calcium salt form and can bind other drugs in the gut. This may reduce oral doxycycline absorption and weaken antibacterial effect.
How serious is the interaction between Doxycycline and Polycarbophil?
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 several hours after polycarbophil. Monitor clinical response to the antibiotic.
What other medicines interact with Polycarbophil?
MediHelp also lists interactions of Polycarbophil with, for example, Demeclocycline, Minocycline, Oxytetracycline. The full list is on the Polycarbophil page.
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