Paxlovid and Simvastatin: Drug Interaction Guide

Quick answer: This is a major interaction — avoid combining Paxlovid and Simvastatin unless specifically directed by your doctor.

Interaction severity: Major — avoid combination

How Paxlovid interacts with Simvastatin

Ritonavir in Paxlovid is a strong CYP3A4 inhibitor, and simvastatin depends heavily on CYP3A4 metabolism. Simvastatin exposure can rise sharply, increasing myopathy and rhabdomyolysis risk.

What you should do

Hold simvastatin before and during Paxlovid treatment and restart only after the CYP3A4 inhibitory effect has sufficiently resolved.

Key facts

Severity

Major — avoid combination

Mechanism

Ritonavir in Paxlovid is a strong CYP3A4 inhibitor, and simvastatin depends heavily on CYP3A4 metabolism. Simvastatin ex...

Action

Hold simvastatin before and during Paxlovid treatment and restart only after the CYP3A4 inhibitory effect has sufficient...

Important medical disclaimer: This page provides educational information about drug interactions for general reference. It is not a substitute for professional medical advice, diagnosis, or treatment. Always discuss your specific medications with a qualified healthcare provider before starting, stopping, or changing any treatment. About our editorial team.

Frequently asked questions

Can I take Paxlovid and Simvastatin together?

No — this combination should generally be avoided. Hold simvastatin before and during Paxlovid treatment and restart only after the CYP3A4 inhibitory effect has sufficiently resolved.

What is the severity of this interaction?

The interaction between Paxlovid and Simvastatin is classified as Major — avoid combination. Ritonavir in Paxlovid is a strong CYP3A4 inhibitor, and simvastatin depends heavily on CYP3A4 metabolism. Simvastatin exposure can rise sharply, increasing myopathy and rhabdomyolysis risk.

What should I do if I'm prescribed both?

Hold simvastatin before and during Paxlovid treatment and restart only after the CYP3A4 inhibitory effect has sufficiently resolved. Always consult your prescribing clinician — do not stop or change medications without medical guidance.

Last reviewed: by iMedic Medical Editorial Team. Our editorial process.