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Atorvastatin and Diltiazem: Drug Interaction Guide

Quick answer: This combination requires caution. Atorvastatin and Diltiazem can be used together with adjustments and monitoring.

Interaction severity: Moderate — caution required

How Atorvastatin interacts with Diltiazem

Diltiazem inhibits CYP3A4, increasing atorvastatin exposure approximately 50% with greater risk of myopathy.

What you should do

Limit atorvastatin to 40 mg daily in patients on diltiazem; monitor for muscle symptoms and creatine kinase if present.

Key facts

Severity

Moderate — caution required

Mechanism

Diltiazem inhibits CYP3A4, increasing atorvastatin exposure approximately 50% with greater risk of myopathy.

Action

Limit atorvastatin to 40 mg daily in patients on diltiazem; monitor for muscle symptoms and creatine kinase if present.

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 Atorvastatin and Diltiazem together?

With caution. Limit atorvastatin to 40 mg daily in patients on diltiazem; monitor for muscle symptoms and creatine kinase if present.

What is the severity of this interaction?

The interaction between Atorvastatin and Diltiazem is classified as Moderate — caution required. Diltiazem inhibits CYP3A4, increasing atorvastatin exposure approximately 50% with greater risk of myopathy.

What should I do if I'm prescribed both?

Limit atorvastatin to 40 mg daily in patients on diltiazem; monitor for muscle symptoms and creatine kinase if present. Always consult your prescribing clinician — do not stop or change medications without medical guidance.

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