Drug interactions
Fluvastatin + Letermovir
Severity: Major
Fluvastatin and Letermovir: 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
Letermovir inhibits OATP1B1/3 and raises exposure of many statins, and fluvastatin concentrations may also increase. This raises the risk of myopathy and rhabdomyolysis, and use is not recommended when cyclosporine is also given.
What this interaction means in plain words
Fluvastatin and Letermovir 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.
Fluvastatin belongs to Cardiovascular; Letermovir belongs to Anti Virals.
Why it happens
Letermovir inhibits OATP1B1/3 hepatic uptake and possibly BCRP, increasing fluvastatin exposure.
What to do
Consider reducing the fluvastatin dose and monitor closely for muscle symptoms. Avoid fluvastatin if the patient also receives cyclosporine.
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 Fluvastatin
- Cyclosporine + Fluvastatin Major
- Cyclosporin + Fluvastatin Major
- Fluvastatin + Gemfibrozil Major
- Fluvastatin + Red yeast rice Major
- Apalutamide + Fluvastatin Moderate
- Cholestyramine + Fluvastatin Moderate
Other interactions of Letermovir
- Ergotamine + Letermovir Contraindicated
- Letermovir + Pimozide Contraindicated
- Apalutamide + Letermovir Major
- Atorvastatin + Letermovir Major
- Carbamazepine + Letermovir Major
- Colchicine + Letermovir Major
Frequently asked questions
Can I take Fluvastatin with Letermovir?
MediHelp rates the interaction as major. Fluvastatin and Letermovir 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. Letermovir inhibits OATP1B1/3 and raises exposure of many statins, and fluvastatin concentrations may also increase. This raises the risk of myopathy and rhabdomyolysis, and use is not recommended when cyclosporine is also given.
How serious is the interaction between Fluvastatin and Letermovir?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Consider reducing the fluvastatin dose and monitor closely for muscle symptoms. Avoid fluvastatin if the patient also receives cyclosporine.
What other medicines interact with Fluvastatin?
MediHelp also lists interactions of Fluvastatin with, for example, Cyclosporine, Cyclosporin, Gemfibrozil. The full list is on the Fluvastatin page.
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