Medication Guides

Is It Safe to Take Fish Oil with Blood Thinners?

Andre Stone | MD

Medically reviewed by Andre Stone | MD, University of Pittsburgh School of Medicine on August 25th, 2026.

Taking fish oil with blood thinners requires medical supervision due to potential interaction risks. Fish oil can affect platelet function, but most studies have not found a meaningful increase in bleeding with typical doses, including among people taking warfarin. Some high-dose omega-3 products may modestly increase bleeding risk, so discuss them with your healthcare provider. Potential effects may depend on the dose and type of omega-3 product, with greater caution warranted for high-dose products. If you take warfarin, your clinician may monitor your INR more closely. Other blood thinners are not routinely monitored with INR, but your clinician can advise whether any follow-up is needed. Always consult your healthcare provider before adding fish oil to your medication regimen to ensure safe, personalized dosing.

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