Niacin and Lovastatin Interaction
Drug interaction information between Niacin and Lovastatin.
Niacin and Lovastatin have a documented moderate interaction in FDA labeling.
FDA drug labeling documents a moderate-severity interaction between Niacin and Lovastatin. 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
Using niacin along with lovastatin increases the risk of serious muscle breakdown and pain.
What To Do
If you take more than one gram of niacin a day, your doctor should monitor you closely for muscle issues.
FDA Label Information
Gemfibrozil Other fibrates Niacin (nicotinic acid) (≥ 1 g/day) Other Drug Interactions Cyclosporine The risk of myopathy/rhabdomyolysis is increased by concomitant administration of cyclosporine (see WARNINGS , Myopathy/Rhabdomyolysis ).
Niacin Also Interacts With
- Atorvastatin moderate
- Ezetimibe moderate
- Ezetimibe/Simvastatin moderate
- Fluvastatin moderate
- Pitavastatin moderate
Lovastatin Also Interacts With
- Darunavir major
- Nirmatrelvir/Ritonavir major
- Spironolactone moderate
- Ketoconazole moderate
- Verapamil moderate
Frequently Asked Questions
Can I take Niacin and Lovastatin together?
This is a moderate interaction. If you take more than one gram of niacin a day, your doctor should monitor you closely for muscle issues.
How serious is the interaction between Niacin and Lovastatin?
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 Lovastatin interact?
Using niacin along with lovastatin increases the risk of serious muscle breakdown and pain.
Understanding the Niacin and Lovastatin 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 Lovastatin belongs to the HMG-CoA Reductase Inhibitor (Statin) class - two categories that can collide when co-prescribed. The mechanism described in FDA labeling is: Using niacin along with lovastatin increases the risk of serious muscle breakdown and pain. 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 Lovastatin has 30. 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: If you take more than one gram of niacin a day, your doctor should monitor you closely for muscle issues. 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 Lovastatin 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.