Drug interactions
Amlodipine-valsartan + Nirmatrelvir / ritonavir
Severity: Moderate
Amlodipine-valsartan and Nirmatrelvir / ritonavir: moderate 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
Ritonavir-boosted nirmatrelvir strongly inhibits CYP3A4 and can markedly raise amlodipine levels, leading to hypotension and edema. The effect continues for several days after the course ends.
What this interaction means in plain words
Amlodipine-valsartan and Nirmatrelvir / ritonavir can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Ritonavir-mediated CYP3A4 inhibition reduces amlodipine clearance.
What to do
Consider reducing the amlodipine dose by half during treatment and for 3 days afterwards, with blood pressure monitoring.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Amlodipine-valsartan
- Aliskiren + Amlodipine-valsartan Contraindicated
- Amlodipine-valsartan + Sparsentan Contraindicated
- Aldesleukin + Amlodipine-valsartan Major
- Amifostine + Amlodipine-valsartan Major
- Amiloride + Amlodipine-valsartan Major
- Amlodipine-valsartan + Benazepril Major
Frequently asked questions
Can I take Amlodipine-valsartan with Nirmatrelvir / ritonavir?
MediHelp rates the interaction as moderate. Amlodipine-valsartan and Nirmatrelvir / ritonavir can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Ritonavir-boosted nirmatrelvir strongly inhibits CYP3A4 and can markedly raise amlodipine levels, leading to hypotension and edema. The effect continues for several days after the course ends.
How serious is the interaction between Amlodipine-valsartan and Nirmatrelvir / ritonavir?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Consider reducing the amlodipine dose by half during treatment and for 3 days afterwards, with blood pressure monitoring.
What other medicines interact with Amlodipine-valsartan?
MediHelp also lists interactions of Amlodipine-valsartan with, for example, Aliskiren, Sparsentan, Aldesleukin. The full list is on the Amlodipine-valsartan page.
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