Documented concern based on cited evidence — not a personalized safety check, not medical advice, and not a decision to combine or avoid. That decision belongs with your prescriber.
Low-grade concern — timing, disclosure, or lab context
Low-grade documented concern. Timing, disclosure, or a lab context decides whether it matters for you.
Mechanism and evidence
High omega-3 doses reduce platelet aggregation; a retrospective cohort of fish oil with warfarin found no significant INR or adverse-event change, so the documented concern is low-grade.
Evidence tier: retrospective
The tier names the strongest cited study design. Some anchors studied the supplement on its own, or a related drug in the same class — in those pairs the grade rests on that evidence plus established pharmacology, as agreed with our medical reviewer.
What to discuss with your prescriber
- Mention high-dose fish oil at INR checks.
- Keep the dose stable rather than on-and-off.