Drug interactions
Fluticasone intranasal + Quinidine
Severity: Minor
Fluticasone intranasal and Quinidine: 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
Quinidine is a CYP3A4 inhibitor, though not a strong one, and may modestly raise systemic fluticasone exposure from intranasal use. This could cause corticosteroid effects such as adrenal suppression or Cushingoid features, mainly with prolonged use. Systemic exposure from the intranasal route is low, so the effect is usually limited.
What this interaction means in plain words
Fluticasone intranasal and Quinidine 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
Quinidine inhibits CYP3A4-mediated metabolism of fluticasone, increasing its systemic exposure.
What to do
No routine change is needed for short-term use. For long-term therapy, watch for signs of corticosteroid excess and use the lowest effective fluticasone dose.
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 Quinidine
- Adagrasib + Quinidine Contraindicated
- Arsenic trioxide + Quinidine Contraindicated
- Artemether / lumefantrine + Quinidine Contraindicated
- Chloroquine + Quinidine Contraindicated
- Dofetilide + Quinidine Contraindicated
- Dronedarone + Quinidine Contraindicated
Frequently asked questions
Can I take Fluticasone intranasal with Quinidine?
MediHelp rates the interaction as minor. Fluticasone intranasal and Quinidine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Quinidine is a CYP3A4 inhibitor, though not a strong one, and may modestly raise systemic fluticasone exposure from intranasal use. This could cause corticosteroid effects such as adrenal suppression or Cushingoid features, mainly with prolonged use. Systemic exposure from the intranasal route is low, so the effect is usually limited.
How serious is the interaction between Fluticasone intranasal and Quinidine?
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 routine change is needed for short-term use. For long-term therapy, watch for signs of corticosteroid excess and use the lowest effective fluticasone dose.
What other medicines interact with Quinidine?
MediHelp also lists interactions of Quinidine with, for example, Adagrasib, Arsenic trioxide, Artemether / lumefantrine. The full list is on the Quinidine page.
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