Drug interactions
Lovastatin + Vitamin b3
Severity: Major
Lovastatin and Vitamin b3: 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
Niacin at lipid-lowering doses with lovastatin raises the risk of myopathy and rhabdomyolysis. Labeling advises limiting the lovastatin dose when it is combined with lipid-modifying doses of niacin.
What this interaction means in plain words
Lovastatin and Vitamin b3 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.
Lovastatin belongs to Cardiovascular; Vitamin b3 belongs to Gastrointestinal Tract.
Why it happens
Additive myotoxicity, with the mechanism not fully established.
What to do
Keep lovastatin at or below the labeled maximum (20 mg/day) when combined with lipid-modifying niacin doses. Monitor for muscle symptoms and check CK if they occur.
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 Vitamin b3
- Simvastatin + Vitamin b3 Major
- Atorvastatin + Vitamin b3 Moderate
- Cholestyramine + Vitamin b3 Moderate
- Colestipol + Vitamin b3 Moderate
- Fluvastatin + Vitamin b3 Moderate
- Insulin aspart protamine / insulin aspart + Vitamin b3 Moderate
Other interactions of Lovastatin
- Atazanavir + Lovastatin Contraindicated
- Clarithromycin + Lovastatin Contraindicated
- Cobicistat + Lovastatin Contraindicated
- Conivaptan + Lovastatin Contraindicated
- Darunavir + Lovastatin Contraindicated
- Elvitegravir / cobicistat / emtricitabine / tenofovir df + Lovastatin Contraindicated
Frequently asked questions
Can I take Lovastatin with Vitamin b3?
MediHelp rates the interaction as major. Lovastatin and Vitamin b3 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. Niacin at lipid-lowering doses with lovastatin raises the risk of myopathy and rhabdomyolysis. Labeling advises limiting the lovastatin dose when it is combined with lipid-modifying doses of niacin.
How serious is the interaction between Lovastatin and Vitamin b3?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Keep lovastatin at or below the labeled maximum (20 mg/day) when combined with lipid-modifying niacin doses. Monitor for muscle symptoms and check CK if they occur.
What other medicines interact with Vitamin b3?
MediHelp also lists interactions of Vitamin b3 with, for example, Simvastatin, Atorvastatin, Cholestyramine. The full list is on the Vitamin b3 page.
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