Drug interactions
Doxycycline + Rifabutin
Severity: Moderate
Doxycycline and Rifabutin: 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
Rifabutin is an enzyme inducer and may reduce doxycycline concentrations, as seen with rifampicin. This could reduce antibacterial efficacy, though the effect with rifabutin is weaker.
What this interaction means in plain words
Doxycycline and Rifabutin 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; Rifabutin belongs to Anti Bacterial.
Why it happens
Rifabutin induces hepatic enzymes (CYP3A4), increasing doxycycline metabolism.
What to do
Monitor clinical response to doxycycline and consider dose adjustment or an alternative agent if treatment fails.
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
Other interactions of Rifabutin
- Cabotegravir + Rifabutin Contraindicated
- Lorlatinib + Rifabutin Contraindicated
- Rifabutin + Voriconazole Contraindicated
- Apixaban + Rifabutin Major
- Axitinib + Rifabutin Major
- Brexpiprazole + Rifabutin Major
Frequently asked questions
Can I take Doxycycline with Rifabutin?
MediHelp rates the interaction as moderate. Doxycycline and Rifabutin 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. Rifabutin is an enzyme inducer and may reduce doxycycline concentrations, as seen with rifampicin. This could reduce antibacterial efficacy, though the effect with rifabutin is weaker.
How serious is the interaction between Doxycycline and Rifabutin?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor clinical response to doxycycline and consider dose adjustment or an alternative agent if treatment fails.
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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