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Niacin × Anticoagulants

MINOR INTERACTION — Possible Evidence

⚠️ Mechanism

Niacin may have mild antiplatelet effects at high doses.

📋 Effect

Possible additive bleeding risk at very high doses

💊 Management

Monitor INR if on warfarin with high-dose niacin. Minor concern at typical doses.

Plain Language Summary

This combination is generally safe at typical doses, but it may pose a minor risk at very high doses. Taking large amounts of niacin can slightly increase the risk of bleeding when used with blood-thinning medications.

Source

Ghosh SK et al. J R Soc Med 1987

Supporting Research

Use of high potency statins and rates of admission for acute kidney injury: multicenter, retrospective observational analysis of administrative databases PMID:23511950 DOI:10.1136/bmj.f880 2013
Meta-analysis and imputation refines the association of 15q25 with smoking quantity PMID:20418889 DOI:10.1038/ng.572 2010
Genome-wide meta-analyses identify multiple loci associated with smoking behavior PMID:20418890 DOI:10.1038/ng.571 2010
Antidepressants for smoking cessation PMID:24402784 DOI:10.1002/14651858.CD000031.pub4 2014
Association Between Lowering LDL-C and Cardiovascular Risk Reduction Among Different Therapeutic Interventions: A Systematic Review and Meta-analysis PMID:27673306 DOI:10.1001/jama.2016.13985 2016
Bupropion for attention deficit hyperactivity disorder (ADHD) in adults PMID:28965364 DOI:10.1002/14651858.CD009504.pub2 2017
Lipid-lowering agents for nephrotic syndrome PMID:24327265 DOI:10.1002/14651858.CD005425.pub2 2013
Effect of lipid-lowering therapies on lipoprotein(a) levels: a comprehensive meta-analysis of randomized controlled trials PMID:40618457 DOI:10.1016/j.atherosclerosis.2025.120420 2025
Medical Disclaimer: This interaction record is for informational and educational purposes only and does not constitute medical advice. Drug-supplement interactions can be dangerous. Always consult your healthcare provider or pharmacist before combining any supplement with prescription medications. Do not stop or change any medication without professional guidance.