Drug interactions
Fexofenadine + Quercetin
Severity: Minor
Fexofenadine and Quercetin: 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
Quercetin may alter intestinal transporter activity and reduce fexofenadine absorption, though data are inconsistent. The clinical impact is expected to be small.
What this interaction means in plain words
Fexofenadine and Quercetin 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
Possible modulation of intestinal P-gp/OATP transport by quercetin; the direction and size of effect are not firmly established.
What to do
No action is generally needed; if antihistamine efficacy seems reduced, consider stopping the quercetin supplement.
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 Fexofenadine
- Danicopan + Fexofenadine Moderate
- Erdafitinib + Fexofenadine Moderate
- Fexofenadine + Glecaprevir / pibrentasvir Moderate
- Fexofenadine + Grapefruit Moderate
- Fexofenadine + Juice Moderate
- Acrivastine + Fexofenadine Minor
Frequently asked questions
Can I take Fexofenadine with Quercetin?
MediHelp rates the interaction as minor. Fexofenadine and Quercetin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Quercetin may alter intestinal transporter activity and reduce fexofenadine absorption, though data are inconsistent. The clinical impact is expected to be small.
How serious is the interaction between Fexofenadine and Quercetin?
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 action is generally needed; if antihistamine efficacy seems reduced, consider stopping the quercetin supplement.
What other medicines interact with Fexofenadine?
MediHelp also lists interactions of Fexofenadine with, for example, Danicopan, Erdafitinib, Glecaprevir / pibrentasvir. The full list is on the Fexofenadine page.
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