Drug interactions
Fluticasone-salmeterol + Nirmatrelvir
Severity: Major
Fluticasone-salmeterol and Nirmatrelvir: major interaction.
Last updated Sources: US FDA label
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
Nirmatrelvir inhibits CYP3A4 and can raise systemic salmeterol exposure. Higher salmeterol levels may cause palpitations, tachycardia, QT prolongation and other cardiovascular adverse effects.
What this interaction means in plain words
Fluticasone-salmeterol and Nirmatrelvir can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Fluticasone-salmeterol belongs to Respiratory; Nirmatrelvir belongs to Anti Virals.
Why it happens
Inhibition of CYP3A4-mediated metabolism of salmeterol increases its systemic concentrations.
What to do
Avoid the combination where possible, for example by using a short-acting beta-agonist or another maintenance inhaler during the antiviral course. If it cannot be avoided, monitor heart rate, rhythm and QTc and watch for tremor and hypokalemia.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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References
Other interactions of Fluticasone-salmeterol
- Darunavir + Fluticasone-salmeterol Contraindicated
- Elvitegravir / cobicistat / emtricitabine / tenofovir df + Fluticasone-salmeterol Contraindicated
- Fluticasone-salmeterol + Fosamprenavir Contraindicated
- Fluticasone-salmeterol + Indinavir Contraindicated
- Fluticasone-salmeterol + Lopinavir Contraindicated
- Fluticasone-salmeterol + Nelfinavir Contraindicated
Other interactions of Nirmatrelvir
- Alfuzosin + Nirmatrelvir Contraindicated
- Amiodarone + Nirmatrelvir Contraindicated
- Apalutamide + Nirmatrelvir Contraindicated
- Carbamazepine + Nirmatrelvir Contraindicated
- Colchicine + Nirmatrelvir Contraindicated
- Dronedarone + Nirmatrelvir Contraindicated
Frequently asked questions
Can I take Fluticasone-salmeterol with Nirmatrelvir?
MediHelp rates the interaction as major. Fluticasone-salmeterol and Nirmatrelvir can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Nirmatrelvir inhibits CYP3A4 and can raise systemic salmeterol exposure. Higher salmeterol levels may cause palpitations, tachycardia, QT prolongation and other cardiovascular adverse effects.
How serious is the interaction between Fluticasone-salmeterol and Nirmatrelvir?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination where possible, for example by using a short-acting beta-agonist or another maintenance inhaler during the antiviral course. If it cannot be avoided, monitor heart rate, rhythm and QTc and watch for tremor and hypokalemia.
What other medicines interact with Fluticasone-salmeterol?
MediHelp also lists interactions of Fluticasone-salmeterol with, for example, Darunavir, Elvitegravir / cobicistat / emtricitabine / tenofovir df, Fosamprenavir. The full list is on the Fluticasone-salmeterol page.
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