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Turmeric is often promoted as a natural remedy for inflammation, joint pain, and overall health. Many people use it daily in food, while others take concentrated curcumin supplements for stronger effects. Curcumin is the main active compound found in turmeric and is believed to be responsible for many of turmeric’s potential health benefits.

Because curcumin may also affect blood clotting and how certain medications are processed in the body, people taking blood thinners such as Eliquis (apixaban) may need to use caution when combining them. A review on drug-food interactions involving apixaban found that turmeric was among the most commonly used herbal products with possible interaction risks.

Below, we’ll explain what current research says about turmeric and Eliquis, how the interaction may happen, and when you should use caution before combining them.

Key Takeaways

  • Curcumin, the active compound in turmeric, may affect blood clotting by reducing platelet aggregation and slowing parts of the clotting process.
  • Eliquis is partly broken down through CYP3A4 and transported by P-gp. Substances that block these pathways, which include curcumin, can increase Eliquis levels and raise bleeding risk.
  • Turmeric used in normal cooking amounts is generally considered less concerning because curcumin levels are much lower and poorly absorbed.
  • High-dose turmeric or curcumin supplements, especially products containing piperine (black pepper extract), should be used cautiously with Eliquis.

How turmeric could interact with Eliquis

Here’s how the turmeric and Eliquis interaction could affect bleeding risk:

1. Curcumin’s antiplatelet activity

Platelets are small blood cells that stick together to help stop bleeding after an injury. Research suggests that curcumin may affect how platelets behave in the body in several ways and could have mild blood-thinning effects.

In one laboratory study, curcumin concentrations of about 20-25 µM significantly reduced the ability of platelets to clump together. Researchers also found that curcumin reduced the production of thromboxane A2, a chemical that helps platelets stick together and tighten blood vessels during clot formation.

At the same time, curcumin interfered with calcium signaling inside platelets. Calcium acts like an internal “on switch” that helps platelets activate and clump together, so lowering calcium signaling can weaken platelet activation.

A separate study found that curcumin reduced platelet aggregation caused by fibrillar amyloid peptides, which are protein fragments that can trigger platelets to clump together under certain conditions.

Curcumin also interfered with several important signaling pathways inside platelets. These pathways act like communication systems that tell platelets when to activate, stick together, and help form blood clots. By disrupting multiple signaling pathways at once, curcumin may make platelets less responsive to clotting signals.

2. Curcumin’s anticoagulant effects

Curcumin may also influence the body’s broader clotting system. In laboratory testing, researchers added curcumin and another turmeric compound called bisdemethoxycurcumin (BDMC) to blood samples and found that the blood took longer to clot.

The study also showed that curcumin reduced the activity of thrombin and factor Xa, two important proteins the body uses to form blood clots. Because Eliquis also targets factor Xa, researchers believe high-dose turmeric supplements could potentially strengthen Eliquis’s blood-thinning effects.

3. Curcumin affects how Eliquis is absorbed

P-glycoprotein, often called P-gp, is a transport protein found in the intestines, liver, and kidneys that helps move certain medications out of cells. This process affects how much of a drug is absorbed into the bloodstream and how quickly it is removed from the body. Eliquis relies partly on this system, so substances that affect P-gp may change Eliquis levels in the body.

Research suggests that curcumin may block, or inhibit, P-gp activity. Using intestinal cells, researchers tested several curcumin formulations at concentrations of 30 µmol/L and 60 µmol/L. All formulations reduced P-gp activity, even though the amount of curcumin absorbed by the cells differed between products.

Because P-gp normally helps push drugs like Eliquis out of intestinal cells, blocking this transport system could allow more Eliquis to enter the bloodstream. This may increase the risk of stronger blood-thinning effects or bleeding when combined with Eliquis.

4. Curcumin affects how Eliquis is broken down in the body

Eliquis is partly broken down by an enzyme in the liver and intestines called CYP3A4. About 25% of the drug depends on this enzyme for metabolism. However, curcumin may interfere with CYP3A4 activity.

One study found that curcuminoids reduced CYP3A4 activity by 50% at a concentration of about 20 µM. When researchers tested pure curcumin and related compounds, the concentrations needed to inhibit CYP3A enzymes in human liver models ranged from about 32 to 58 µM.

Another study showed that curcumin inhibited CYP3A4 at 16.3 µM and did so through competitive inhibition, meaning curcumin may compete with other substances that rely on the same enzyme pathway. Curcumin also affected several other drug-processing enzymes, including CYP1A2, CYP2D6, CYP2B6, and CYP2C9, although CYP3A4 remains the most important for Eliquis.

In short, curcumin may slow down part of the system the body uses to process Eliquis. If Eliquis is broken down more slowly, more of the medication could stay in the bloodstream for longer, potentially increasing blood-thinning effects and bleeding risk.

5. High-absorption turmeric supplements

Curcumin is fat-soluble and does not dissolve well in water, which is one reason the body absorbs it poorly. Even when some curcumin is absorbed, the intestines and liver quickly break much of it down into other forms before removing it from the body.

Because of this low natural absorption, many turmeric supplements include ingredients like piperine (black pepper extract) to help more curcumin enter the bloodstream. However, studies show that piperine can also inhibit CYP3A4.

As discussed earlier, slowing CYP3A4 activity may reduce how quickly Eliquis is broken down, potentially increasing drug levels in the bloodstream. Because of this, high-absorption curcumin supplements that contain piperine could further increase the risk of stronger blood-thinning effects and bleeding in some patients.

Can you take turmeric with Eliquis?

Turmeric and Eliquis (apixaban) interaction

Small amounts of turmeric used in cooking are generally considered safe for most people taking Eliquis.

On the other hand, concentrated supplements (high-dose turmeric or curcumin supplements), especially products with black pepper extract (piperine) or enhanced absorption formulas, may increase bleeding risk. They can affect platelets, clotting proteins, and some of the pathways the body uses to process Eliquis. Evidence from a patient who developed a large hematoma while taking curcumin and apixaban suggests this combination could increase bleeding risk.

In a case report published in 2022, a 74-year-old man taking multiple medications, including apixaban (5 mg twice daily) and clopidogrel (75 mg daily), started taking 1 gram of curcumin daily for abdominal inflammation.

Within a week, he developed a large spontaneous hematoma in his thigh along with pain and anemia. He eventually needed blood transfusions, and his condition improved after stopping curcumin. The researchers noted that curcumin may have contributed to the bleeding event when combined with blood-thinning medications.

There have also been other reports of serious bleeding events involving herbal products and direct oral anticoagulants (DOACs). In one case, a patient taking dabigatran died from gastrointestinal bleeding after regularly consuming boiled ginger and cinnamon, two herbs that may affect clotting and drug transport pathways.

Although this case did not involve turmeric specifically, it shows that some herbs and supplements can increase the effects of blood thinners or affect how these medications are broken down in the body. Before taking turmeric supplements with Eliquis, it’s best to speak with your doctor or pharmacist, especially if you also take aspirin, NSAIDs, or other blood thinners.

Turmeric in the diet vs. supplements

Using turmeric occasionally in meals is unlikely to significantly affect Eliquis levels or blood-thinning activity. But if you regularly consume large amounts of turmeric in food, you should still mention it to your healthcare provider.

A dessert spoon of turmeric powder, which is about 3 grams, contains only around 30-90 mg of curcumin. In addition, curcumin is naturally absorbed poorly by the body, so small dietary amounts usually lead to low bloodstream exposure.

Curcumin supplements are very different from culinary turmeric. Many products contain 500-1,000 mg of concentrated curcuminoids per capsule, which can be roughly 5-15 times more than the amount found in a teaspoon of turmeric spice.

Many supplements also include ingredients such as piperine, which is known to inhibit one of the systems involved in breaking down Eliquis, further increasing drug exposure.

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Bottom line

Laboratory studies show that curcumin, the main active compound in turmeric, can affect several parts of the body’s clotting process. It may reduce platelet aggregation, prolong clotting times, and interfere with systems involved in breaking down Eliquis. Combining curcumin with Eliquis could strengthen blood-thinning effects and increase bleeding risk. A reported case of a patient developing a large hematoma after taking curcumin with apixaban suggests this interaction may have real clinical effects in some people.

Small amounts of turmeric used in cooking are unlikely to cause significant problems for most people taking Eliquis. However, high-dose curcumin supplements, especially products containing piperine, should be used cautiously. If you take Eliquis, it is important to speak with your doctor or pharmacist before using turmeric or curcumin supplements.

Frequently Asked Questions

Turmeric is not a prescription blood thinner, but its active compound, curcumin, may have mild blood-thinning effects. Studies suggest curcumin can reduce platelet clumping and affect clotting activity, which may increase bleeding concerns when combined with anticoagulants. Cooking with turmeric is usually much less concerning than taking concentrated curcumin supplements.

Yes, turmeric or curcumin supplements may interact with some medications, especially blood thinners, antiplatelet drugs, NSAIDs, and other products that affect bleeding. Some turmeric products also contain piperine, which can increase curcumin absorption and may raise interaction concerns. People taking prescription medicines should check with a healthcare provider before using turmeric supplements.

You should avoid turmeric or curcumin supplements with warfarin unless your doctor approves. In a reported case, a patient on stable warfarin developed an INR above 10 after starting a turmeric product, greatly increasing bleeding risk.

Yes, typical vitamin C intake is generally considered low concern with Eliquis, and it is not known as a major apixaban interaction. However, very high doses of vitamin C can cause side effects such as diarrhea, nausea, stomach cramps, and may be a concern for people prone to kidney stones. Ask your doctor before taking high-dose vitamin C supplements.

Use caution with vitamin E supplements while taking Eliquis, especially at high doses. Vitamin E can affect platelet aggregation and may increase bleeding risk when combined with anticoagulant or antiplatelet medications.

High-dose vitamin E is one to be careful with because it may increase bleeding risk. Unlike warfarin, Eliquis works by blocking factor Xa, so vitamin K is not usually the main concern. The bigger risk is taking high-dose supplements, herbal blends, or products that also affect bleeding without medical guidance.

Turmeric may interact with blood pressure medication in some cases, especially when taken as a concentrated supplement. Curcumin has been studied for possible blood-pressure effects, so it could add to the effects of antihypertensive drugs in certain people. If you take blood pressure medicine, ask your doctor before using turmeric supplements and monitor for dizziness or unusually low blood pressure.

Yes. Coumadin is warfarin, and turmeric or curcumin supplements may increase bleeding risk when taken with it. A reported case linked a turmeric product with a sharp INR increase in a patient taking warfarin, so this combination should be avoided unless supervised by a healthcare provider.

Small amounts of ginger in food are usually not a major concern, but ginger supplements or frequent high-dose ginger use should be discussed with your doctor. Ginger may affect bleeding in some people, and Eliquis already increases bleeding risk. Be extra careful if you also take aspirin, NSAIDs, antiplatelet drugs, or other blood thinners.

Grapefruit may affect Eliquis because grapefruit can block intestinal CYP3A4, and Eliquis is partly processed through CYP3A4 and P-gp pathways. This could theoretically increase apixaban levels and bleeding risk, especially with large or frequent grapefruit intake. Ask your doctor or pharmacist whether you should limit grapefruit, pomelos, Seville oranges, or tangelos while taking Eliquis.

Fish oil may be safe for some people taking Eliquis at typical doses, but high-dose omega-3 supplements can have mild antiplatelet effects and may increase bleeding concerns. Research has not consistently shown major bleeding problems at moderate doses, but caution is still recommended when fish oil is combined with anticoagulants. Ask your doctor before taking fish oil with Eliquis, especially if you also use aspirin, NSAIDs, or other blood-thinning medications.

Related Articles

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