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People take fish oil supplements for different reasons, such as lowering triglycerides, supporting brain health, easing joint pain, or improving overall nutrition. Some people are also advised to take it after blood tests show low omega-3 levels. But if you’re already taking Eliquis, you may wonder whether fish oil could increase bleeding, bruising, or nosebleeds.

You can usually take fish oil with Eliquis (apixaban), and most people using standard doses do not experience serious interactions. However, some research reported higher rates of minor bleeding with high-dose EPA fish oil supplements.

So, how much fish oil is considered safe? Which omega-3 products are more concerning? And who should avoid combining them altogether? Here’s what the research actually shows.

Key Takeaways

  • You can usually take fish oil with Eliquis. However, higher doses, especially above 3 grams per day, may raise bleeding risk. Consult your healthcare team about all supplements and medications to ensure safe and coordinated care.
  • High-dose EPA (4 grams/day) may increase the rate of minor bleeding, although major bleeding remains rare.
  • Surveys of apixaban users indicate that many people take fish oil or other supplements but often lack knowledge about potential interactions.
  • Stay within moderate doses (up to 3 grams/day) unless prescribed otherwise, and consult your healthcare provider before taking high-dose fish oil. Monitor for signs of bleeding and report any concerns promptly.

Is omega-3 fish oil a blood thinner?

Omega-3 can have a mild blood-thinning effect by reducing how easily platelets clump together. Platelets are tiny blood cells that stick together to form clots when you’re injured. Omega-3 fatty acids, especially EPA and DHA found in fish oil, make platelets less sticky, so they are less likely to clump together and form clots too easily.

It also changes the balance of certain chemicals in the body involved in clotting and inflammation. Omega-3s reduce the production of substances like thromboxane A2, which normally signals platelets to aggregate and tighten blood vessels. At the same time, they can increase compounds that relax blood vessels and reduce inflammation. These effects may slightly slow clot formation and improve blood flow.

For most people, this effect is mild and not dangerous at standard supplement doses. However, at high doses, or when combined with medications like warfarin, aspirin, or Eliquis, the reduced clotting ability can raise the risk of bruising or bleeding.

Can you take fish oil with Eliquis?

Yes, you can usually take fish oil with Eliquis (apixaban). For most people taking standard fish oil doses, the interaction is not considered severe. However, higher doses of omega-3 supplements, especially above 3 grams per day, may raise bleeding risk.

It’s best to check with your healthcare provider before combining them, particularly if you also take aspirin, NSAIDs, or other supplements that affect clotting.

In a survey published in the Journal of the American Geriatrics Society, researchers assessed 791 patients taking apixaban about their use of over-the-counter products. Fish oil, omega-3 fatty acids, or cod liver oil were among supplements reported to increase bleeding risk, listed alongside vitamin E, ginger, and other herbs.

The survey found that 78.1% of participants used at least one dietary supplement daily, and 22.3% of respondents reported daily or most days use of fish oil or similar omega-3 supplements. However, only about two-thirds of respondents reported talking to a health professional about whether it was okay to take an OTC product with apixaban.

High EPA doses may increase the risk of minor bleeding

Capsules spilling from bottle on wooden surface

While most studies show little effect on major bleeding, the dose and type of fatty acid appear to make a difference.

A large analysis of 38 studies involving more than 149,000 people found that omega-3 fatty acids did not significantly increase the risk of bleeding. However, when looking specifically at EPA, they found about a 49% higher bleeding risk compared with placebo, although the overall number of bleeding events remained low.

Another meta-analysis of more than 120,000 patients also found that omega-3 supplements did not significantly increase overall bleeding risk compared with placebo. Rates of hemorrhagic stroke, intracranial bleeding, and gastrointestinal bleeding were also similar between groups. However, people taking high-dose purified EPA had about a 50% higher relative risk of bleeding, though the actual increase in bleeding events was only about 0.6% higher than placebo.

Many supplements contain both EPA and DHA. EPA-only products like icosapent ethyl (Vascepa) are used for high triglyceride levels at doses of 4 grams/day. Higher bleeding risk observed in EPA-only trials may not apply to combination products.

How much fish oil is safe with Eliquis?

There is no standard recommended dose of fish oil that applies to everyone. Whether fish oil supplementation is appropriate, and how much you can safely take, depends on factors like your bleeding risk, medical history, other medications, and the type of omega-3 product you use.

Your doctor may recommend avoiding high-dose fish oil, especially if you already bruise easily or take other blood-thinning medications. Because both fish oil and Eliquis can affect clotting, strictly follow your healthcare provider’s instructions.

For healthy individuals, the National Institutes of Health recommends about 1.1-1.6 grams of omega-3s daily, depending on age and sex. For EPA and DHA, the combined recommended daily intake is generally around 250-500 mg per day for healthy adults.

A standard fish oil capsule typically contains about 1,000 mg of fish oil, providing roughly 180 mg EPA and 120 mg DHA, although amounts can vary by brand. Because formulations differ widely, check labels carefully for the exact amounts of EPA and DHA rather than relying only on the total fish oil amount.

Other than fish oil, omega-3 supplements come in several forms, including krill oil, cod liver oil, and algae-based products, which may affect how well omega-3s are absorbed. Fish oil commonly contains triglycerides or ethyl esters, while krill oil contains phospholipids, which some studies suggest may improve absorption.

Vegetarian algal oil supplements usually provide 100-300 mg DHA, with some also containing EPA, and may be absorbed as effectively as omega-3s from cooked salmon.

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Signs of excess bleeding and when to seek help

Even though the overall risk is low, it is still important to be aware of the signs that you might be bleeding more easily. Here are warning signs to monitor:

    • Unusual bruising: Bruises that appear with minimal or no injury may signal that your blood is taking longer to clot.
    • Frequent nosebleeds or bleeding gums: Occasional small nosebleeds can happen, but repeated episodes should be discussed with your doctor.
    • Prolonged bleeding from cuts: If small cuts bleed longer than expected, it may indicate too much anticoagulant effect.
    • Blood in urine or stools, or black tarry stools: These are signs of internal bleeding and require urgent medical attention.
    • Severe headache or weakness: Sudden severe headache, dizziness, or weakness may signal internal bleeding in the brain and requires immediate medical care.

If you notice any of these symptoms, stop taking the fish oil and contact your healthcare provider. Do not stop Eliquis without medical advice, as abrupt discontinuation can increase the risk of stroke.

Practical guidance for patients taking Eliquis and fish oil

A few simple precautions may help lower the risk of bleeding and make fish oil supplementation safer while you’re on Eliquis.

Talk with your healthcare team

The survey of apixaban users found that many people do not discuss supplement use with their doctors. Bringing a full list of your medications and supplements to appointments helps your providers identify possible interactions. Even if fish oil seems benign, your doctor might adjust your Eliquis dose or recommend closer monitoring if you plan to increase fish oil intake.

Start low and choose quality products

When introducing fish oil, start with a low dose (e.g., 500-1000 mg of EPA+DHA per day). Choose reputable brands that undergo third-party purity testing to ensure they are free from contaminants like mercury and PCBs. Some people prefer enteric-coated capsules to minimize fishy burps.

Monitor for changes

Pay attention to bruises, bleeding, or stomach upset when taking fish oil with Eliquis. If you raise the dose, inform your doctor. There is no routine blood test equivalent to INR for apixaban, but your doctor may order kidney and liver function tests as part of regular follow-up.

Take your diet into consideration

Omega-3 fatty acids can come from both plant and animal sources, which may reduce the need for supplements. Plant-based sources include:

    • flaxseed oil
    • soybean oil
    • canola oil
    • chia seeds
    • walnuts

Fatty fish such as salmon, mackerel, tuna, herring, and sardines are rich in EPA and DHA, while leaner fish like cod and tilapia contain lower amounts. The omega-3 content of fish can also vary depending on what the fish ate. Farmed fish often contain more EPA and DHA than wild fish, although changes in fish feed have reduced omega-3 levels in some farm-raised salmon over time. Grass-fed beef also contains slightly more omega-3s than grain-fed beef, though overall amounts remain low.

Some foods, including eggs, milk, yogurt, soy beverages, and infant formula, are fortified with DHA and other omega-3s. Because omega-3 content differs widely between foods and supplements, checking nutrition labels can help estimate intake.

Understand that “natural” does not mean risk-free

Many people assume that over-the-counter supplements are harmless. Yet herbs and nutrients can have potent biological effects. The survey of apixaban users listed fish oil among several supplements considered to have potential for increased bleeding. Always treat supplements with the same respect as medications.

Bottom line

Taking fish oil with Eliquis is usually safe at low to moderate doses. However, higher doses, especially EPA-only supplements, may slightly increase the risk of bleeding or bruising. It’s important to tell your doctor about any supplements you take, choose quality products, and watch for unusual bleeding symptoms.

Everyone responds differently based on factors like other medications, kidney or liver function, and overall health. It’s best to discuss fish oil use with your healthcare provider before starting supplementation.

Frequently Asked Questions

Yes, but only with your prescriber’s approval. Omega-3 supplements can have mild blood-thinning or antiplatelet effects at higher doses, so people on anticoagulants or antiplatelet drugs may need monitoring for bleeding.

Fish oil may affect clotting tests, such as INR, in some people taking warfarin/Coumadin. In one case report, the patient’s INR increased from 2.94 to 4.13 after starting fish oil with warfarin, although no bleeding symptoms were observed. INR should be monitored when starting, stopping, or changing the dose of fish oil.

Only when cleared by a healthcare professional. Plavix already reduces platelet clotting and can cause serious bleeding, while fish oil may add a small antiplatelet effect, especially at higher doses.

Yes, you can usually take krill oil with Eliquis, but you should consult your doctor first. Both products can increase the risk of bleeding, especially if taken together regularly or at higher doses. Watch for signs such as easy bruising, nosebleeds, bleeding gums, black stools, or blood in the urine. Seek immediate medical care if you develop severe or uncontrolled bleeding. 

The main possible problem is increased bleeding, such as easy bruising, nosebleeds, prolonged bleeding from cuts, blood in urine or stool, or unusually heavy bleeding. Eliquis can cause serious or potentially fatal bleeding, so new or severe bleeding symptoms need urgent medical attention.

Possible effects include easier bruising, more frequent nosebleeds, bleeding that takes longer to stop, black or bloody stools, blood in urine, or coughing/vomiting blood. Plavix labeling warns that bleeding can be serious, and fish oil may modestly increase bleeding tendency at higher doses.

Omega-3 is not classified as an anticoagulant drug like warfarin or Eliquis. It may have antiplatelet effects at high doses, but it should not be used as a replacement for prescribed blood thinners.

Related Articles

Sources

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