Drug interactions
Doxycycline + Tezacaftor
Severity: Minor
Doxycycline and Tezacaftor: minor 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
Tezacaftor is metabolized by CYP3A4 and its exposure rises with strong or moderate inhibitors. Doxycycline has no established significant CYP3A4 inhibition, so any increase is likely small.
What this interaction means in plain words
Doxycycline and Tezacaftor have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Theoretical CYP3A4 inhibition by doxycycline reducing tezacaftor metabolism.
What to do
No empirical dose adjustment is needed; monitor for adverse effects such as elevated liver enzymes and headache.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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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 Tezacaftor?
MediHelp rates the interaction as minor. Doxycycline and Tezacaftor have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Tezacaftor is metabolized by CYP3A4 and its exposure rises with strong or moderate inhibitors. Doxycycline has no established significant CYP3A4 inhibition, so any increase is likely small.
How serious is the interaction between Doxycycline and Tezacaftor?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No empirical dose adjustment is needed; monitor for adverse effects such as elevated liver enzymes and headache.
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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