Several common medications, supplements, and substances can cause dangerous interactions with Eliquis (apixaban), either raising your bleeding risk or making the drug less effective at preventing blood clots. The most important categories to avoid are anti-inflammatory painkillers, certain herbal supplements, and specific prescription drugs that change how your body processes Eliquis.
Why Eliquis Interacts With Other Substances
Eliquis is broken down in your body through two main pathways: a liver enzyme called CYP3A4 and a protein transporter called P-glycoprotein. About a quarter of each dose is processed through the liver enzyme, while the transporter helps move the remaining active drug out through your kidneys and intestines. Drugs that block either of these pathways cause Eliquis to build up in your blood, increasing your bleeding risk. Drugs that speed up these pathways push Eliquis out of your system faster, potentially leaving you unprotected against blood clots.
Because more than 70% of each Eliquis dose leaves your body as the unchanged drug, the overall risk of interactions is lower than with some other medications. But the interactions that do occur can be serious, and some are common enough that every Eliquis user should know about them.
Anti-Inflammatory Painkillers
NSAIDs like ibuprofen (Advil, Motrin), naproxen (Aleve), and diclofenac are the most widely used drugs that cause problems with Eliquis. A large study published by the European Society of Cardiology found that taking an NSAID alongside a blood thinner roughly doubled the overall risk of internal bleeding. The risks varied by drug: ibuprofen raised bleeding risk by about 1.8 times, diclofenac by 3.3 times, and naproxen by 4.1 times.
The location of the bleeding matters too. NSAID use alongside anticoagulants raised the risk of gut bleeding by 2.2 times and brain bleeding by 3.2 times. These numbers held across all the major blood thinners studied, including Eliquis specifically. Both NSAIDs and Eliquis independently affect your blood’s ability to clot, so combining them creates a compounding effect.
If you need occasional pain relief while on Eliquis, acetaminophen (Tylenol) is generally considered the safer alternative since it doesn’t interfere with clotting the way NSAIDs do.
Herbal Supplements That Change Eliquis Levels
St. John’s wort is the most dangerous herbal supplement to take with Eliquis. It strongly activates the same liver enzyme and transporter that clear Eliquis from your body, which can significantly reduce the drug’s blood levels. This interaction is classified as “major,” meaning the combination should be avoided entirely because Eliquis may no longer protect you from blood clots.
Other herbal supplements raise concern for different reasons. Ginkgo biloba, turmeric, and ginger have mild blood-thinning properties of their own, which could increase bleeding risk when stacked on top of Eliquis. While these interactions are less well-studied than pharmaceutical ones, the potential for harm is real enough that you should mention any supplements you take to your prescriber.
Prescription Drugs That Increase Bleeding Risk
Certain prescription medications block both CYP3A4 and P-glycoprotein at the same time, which can nearly double the amount of Eliquis circulating in your blood. The FDA prescribing label specifically names several categories:
- Antifungal medications: Ketoconazole and itraconazole. In clinical testing, ketoconazole doubled the blood concentration of Eliquis.
- HIV medications: Ritonavir and cobicistat-containing regimens. These cause a prolonged slowdown of Eliquis metabolism that takes several days to resolve even after stopping.
- Antibiotics: Clarithromycin is the primary one flagged as a strong dual inhibitor.
When someone on a standard Eliquis dose needs one of these medications, the prescribing guidance in the U.S. calls for cutting the Eliquis dose in half. For people already on the lowest Eliquis dose (2.5 mg twice daily), adding any of these drugs is not recommended at all, and an alternative anticoagulant may be necessary.
Drugs That Make Eliquis Less Effective
The opposite problem occurs with drugs that rev up CYP3A4 and P-glycoprotein activity. These “inducers” push Eliquis out of your system faster than intended, potentially dropping blood levels low enough that the drug no longer prevents clots. The FDA label advises avoiding Eliquis entirely with:
- Rifampin: An antibiotic used for tuberculosis and some other infections.
- Carbamazepine and phenytoin: Seizure medications that strongly activate the enzyme pathway.
- St. John’s wort: Listed here as well because it acts as a strong inducer.
This is a particularly risky type of interaction because you won’t feel any different. There are no symptoms to warn you that Eliquis has stopped working. The first sign could be a blood clot, stroke, or pulmonary embolism.
Other Blood Thinners and Antiplatelet Drugs
Combining Eliquis with other anticoagulants or antiplatelet drugs (like aspirin or clopidogrel) increases bleeding risk substantially. The FDA’s boxed warning specifically notes that concomitant use of drugs affecting hemostasis, including other anticoagulants, platelet inhibitors, and NSAIDs, raises the risk of spinal or epidural bleeding in patients undergoing spinal procedures. Even outside of procedures, doubling up on blood-thinning effects is one of the most common causes of serious bleeding events. If you’re taking low-dose aspirin alongside Eliquis, that decision should have been made deliberately by your prescriber after weighing the clot prevention benefit against the added bleeding risk.
Alcohol
There is no direct chemical interaction between alcohol and Eliquis. However, alcohol independently impairs your blood’s ability to clot, so drinking while on Eliquis can amplify bleeding risk even without a formal drug interaction. Heavy drinking also raises your risk of falls, which are more dangerous when you’re on a blood thinner. There’s no universally agreed-upon “safe” amount, but occasional light drinking is generally tolerated differently than regular or heavy consumption.
Foods and Dietary Restrictions
One genuine advantage of Eliquis over older blood thinners like warfarin is that it has far fewer dietary restrictions. Warfarin users need to carefully monitor vitamin K intake from leafy greens and avoid grapefruit, cranberry, and pomegranate. Eliquis works through a completely different mechanism and is not affected by vitamin K levels, so you do not need to limit foods like spinach, kale, or broccoli. Grapefruit is a mild CYP3A4 inhibitor, but the effect is modest enough that normal dietary amounts are not considered clinically significant for Eliquis users.
Signs of a Dangerous Interaction
If something you’re taking is pushing your Eliquis levels too high, the first warning signs are typically related to unusual bleeding. Watch for black or tar-like stools, which indicate bleeding in the digestive tract. Vomiting material that looks like coffee grounds is another red flag. Urine that turns red or dark brown, unexplained bruising, tiny red or purple spots on your skin, or bleeding that won’t stop from minor cuts all suggest your blood is too thin. These symptoms warrant urgent medical attention, especially if you’ve recently started a new medication or supplement.
Stopping Eliquis suddenly also carries serious risk. The FDA’s most prominent warning on the label states that premature discontinuation increases the risk of blood clots, stroke, and related events. If an interaction requires you to stop Eliquis, your prescriber will typically bridge you to another anticoagulant rather than leaving you unprotected.