Niacin and Ezetimibe Interaction
Drug interaction information between Niacin and Ezetimibe.
Niacin and Ezetimibe have a documented moderate interaction in FDA labeling.
FDA drug labeling documents a moderate-severity interaction between Niacin and Ezetimibe. Major interactions are generally avoided, moderate ones may need monitoring or a dose adjustment, and minor ones are usually low-risk. This page shows the documented mechanism and guidance. Label-documented interactions are not a complete safety review, so always confirm your own medications with a pharmacist or doctor. Educational information, not medical advice.
How They Interact
Combining these drugs increases the chance of developing serious muscle problems. Research also shows that adding niacin to this treatment might not provide extra heart health benefits for some patients.
What To Do
Your doctor will decide if you need both medications based on your risk of muscle injury. Be sure to tell your healthcare provider if you experience any muscle pain or weakness.
FDA Label Information
Niacin Clinical Impact: Cases of myopathy and rhabdomyolysis have been observed with concomitant use of lipid modifying dosages of niacin-containing products (≥1 gram/day niacin) with ezetimibe and simvastatin. In a clinical trial (median follow-up 3.9 years) of patients at high risk of CVD and with well-controlled LDL-C levels on simvastatin 40 mg/day with or without ezetimibe 10 mg/day, there was no incremental benefit on cardiovascular outcomes with the addition of lipid-modifying doses of niacin Intervention: Concomitant use of ezetimibe and simvastatin with lipid-modifying dosages of...
Niacin Also Interacts With
- Atorvastatin moderate
- Ezetimibe/Simvastatin moderate
- Fluvastatin moderate
- Lovastatin moderate
- Pitavastatin moderate
Ezetimibe Also Interacts With
- Amlodipine major
- Diltiazem major
- Verapamil major
- Cyclosporine major
- Amiodarone major
Frequently Asked Questions
Can I take Niacin and Ezetimibe together?
This is a moderate interaction. Your doctor will decide if you need both medications based on your risk of muscle injury. Be sure to tell your healthcare provider if you experience any muscle pain or weakness.
How serious is the interaction between Niacin and Ezetimibe?
This interaction is classified as "moderate" severity by the FDA. Moderate interactions may worsen your condition or change how your medications work.
Why do Niacin and Ezetimibe interact?
Combining these drugs increases the chance of developing serious muscle problems. Research also shows that adding niacin to this treatment might not provide extra heart health benefits for some patients.
Understanding the Niacin and Ezetimibe Interaction
FDA-approved prescribing information for these two drugs flags their combination as a moderate-severity interaction. Niacin belongs to the Vitamin B3 (Lipid-Modifying) class and Ezetimibe belongs to the Cholesterol Absorption Inhibitor class - two categories that can collide when co-prescribed. The mechanism described in FDA labeling is: Combining these drugs increases the chance of developing serious muscle problems. Severity tiers matter: major flags generally advise avoidance, moderate flags often require monitoring or dose adjustment, and minor flags may only call for awareness.
Context around a specific patient determines real-world impact. Niacin has 21 total documented interactions on file in this dataset, and Ezetimibe has 25. Each additional medication compounds the interaction surface, which is why pharmacists run full-profile checks rather than evaluating one pair at a time. FDA-derived guidance for this pair is: Your doctor will decide if you need both medications based on your risk of muscle injury. Timing of doses, renal and hepatic function, age, and other concurrent prescriptions all shape whether a labeled interaction matters clinically.
An interaction flag is not a verdict. A large share of labeled interactions are managed routinely in clinical practice, the fix may be as simple as spacing doses or adding a monitoring test. Others require the prescriber to choose a different medication entirely. This page surfaces FDA-sourced labeling and openFDA data for educational purposes only; it is not medical advice and cannot account for your full clinical picture. Never start, stop, or adjust either Niacin or Ezetimibe based on a web page, speak with your prescriber or pharmacist before making any change.
Sources: FDA Drug Labels (SPL) via openFDA (2026). This is for informational purposes only and is not medical advice. Always consult your healthcare provider about drug interactions.
Read our methodology - how this data is sourced, computed, and verified.