NovoEight Drug Interactions: What to Avoid and What to Tell Your Doctor

One of the questions most commonly asked about any medication is: what else can't I take with it? For NovoEight (turoctocog alfa), the answer is nuanced — there are no known direct drug-drug interactions between NovoEight and other medications. However, people with hemophilia A must be extremely thoughtful about any medication or supplement that affects bleeding or coagulation.

This guide covers what the FDA label says about interactions, what you need to tell your doctor, and the categories of substances that require extra caution.

What the FDA Says About NovoEight Drug Interactions

The FDA-approved prescribing information for NovoEight states: "There are no known interactions between NovoEight and other medicinal products." This means that turoctocog alfa itself does not have identified pharmacokinetic or pharmacodynamic interactions with other drugs.

However, this does not mean all medications are safe for people with hemophilia A. The concern is not that another drug will interfere with how NovoEight works in your body — it's that certain medications increase bleeding risk independently, which can overwhelm the protection that NovoEight provides.

Category 1: NSAIDs — A Serious Risk for Hemophilia A Patients

Non-steroidal anti-inflammatory drugs (NSAIDs) include common over-the-counter pain relievers like ibuprofen (Advil, Motrin), naproxen (Aleve), and aspirin. These drugs:

Inhibit platelet function, impairing the first step of clot formation

Increase gastrointestinal bleeding risk

Can cause or worsen joint and muscle bleeds when taken regularly

People with hemophilia A should generally avoid NSAIDs entirely unless specifically instructed otherwise by their hematologist. For pain management, acetaminophen (Tylenol) is considered safer for most hemophilia patients, though dosing should be discussed with your care team.

Category 2: Anticoagulants and Antiplatelet Drugs

Anticoagulant medications (blood thinners) such as warfarin (Coumadin), heparin, apixaban (Eliquis), and rivaroxaban (Xarelto) are sometimes prescribed for conditions like atrial fibrillation or blood clots, even in people with hemophilia A. This is a complex clinical situation requiring careful specialist management.

Antiplatelet drugs like clopidogrel (Plavix) further impair platelet function. Any combination of hemophilia A and anticoagulant/antiplatelet therapy requires very close monitoring by your hematologist.

Category 3: Supplements That Affect Bleeding

Several common dietary supplements have blood-thinning effects that may increase bleeding risk for NovoEight users:

Omega-3 fatty acids (fish oil): High doses can impair platelet aggregation. Low doses may be acceptable — discuss with your hematologist.

Vitamin E (high dose): May have anticoagulant effects at high doses (above 400 IU/day).

Garlic supplements: Concentrated garlic has antiplatelet properties. Dietary garlic in cooking is generally fine.

Ginger and turmeric supplements: High-dose supplements may mildly inhibit platelet function.

Ginkgo biloba: Has documented antiplatelet activity and should generally be avoided by people with hemophilia A.

Category 4: Alcohol

There are no known direct interactions between alcohol and NovoEight. However, heavy alcohol use can increase the risk of bleeding in several ways: it impairs platelet function, can cause gastrointestinal bleeding, and increases injury risk. People with hemophilia A who drink should discuss safe limits with their hematologist.

What to Tell Every Healthcare Provider You See

Every dentist, surgeon, ER doctor, or new prescriber you see needs to know:

You have hemophilia A (confirmed diagnosis, severity level)

You are currently taking NovoEight (turoctocog alfa) — include the dose and frequency

Your inhibitor status (positive or negative, with the most recent Bethesda assay result)

Your Hemophilia Treatment Center's contact information for emergencies

The American Society of Hematology recommends that people with hemophilia wear a medical identification bracelet or carry a letter from their HTC at all times, especially when traveling.

Planned Surgeries or Procedures: Always Coordinate in Advance

If you are scheduled for any surgery, dental procedure, or invasive test, contact your HTC immediately so your NovoEight dosing can be adjusted to maintain adequate FVIII levels throughout the procedure and recovery period.

For information on side effects, see: NovoEight Side Effects: What to Expect and When to Call Your Doctor.

Need to find your NovoEight prescription at a pharmacy? medfinder calls pharmacies on your behalf to check availability.