Drug interactions
Nirmatrelvir + Salmeterol
Severity: Major
Nirmatrelvir and Salmeterol: major 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
Nirmatrelvir inhibits CYP3A4 and can increase salmeterol exposure. This may increase palpitations, sinus tachycardia and QT prolongation. The risk is greatest in patients with cardiac disease or electrolyte disturbance.
What this interaction means in plain words
Nirmatrelvir and Salmeterol 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 belongs to Anti Virals; Salmeterol belongs to Respiratory.
Why it happens
CYP3A4 inhibition by nirmatrelvir reduces salmeterol clearance.
What to do
Avoid concurrent use where feasible; consider holding salmeterol during the short antiviral course and using short-acting bronchodilators as needed. If continued, monitor heart rate and rhythm.
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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Other interactions of Salmeterol
- Ritonavir + Salmeterol Contraindicated
- Salmeterol + Saquinavir Contraindicated
- Amitriptyline + Salmeterol Major
- Arformoterol + Salmeterol Major
- Atazanavir + Salmeterol Major
- Budesonide-formoterol + Salmeterol Major
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 Nirmatrelvir with Salmeterol?
MediHelp rates the interaction as major. Nirmatrelvir and Salmeterol 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 increase salmeterol exposure. This may increase palpitations, sinus tachycardia and QT prolongation. The risk is greatest in patients with cardiac disease or electrolyte disturbance.
How serious is the interaction between Nirmatrelvir and Salmeterol?
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 concurrent use where feasible; consider holding salmeterol during the short antiviral course and using short-acting bronchodilators as needed. If continued, monitor heart rate and rhythm.
What other medicines interact with Salmeterol?
MediHelp also lists interactions of Salmeterol with, for example, Ritonavir, Saquinavir, Amitriptyline. The full list is on the Salmeterol page.
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