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

Nabumetone has moderate to major interactions with over 200 different medications, according to available interaction databases. Most of these are manageable with monitoring, but a few require you to avoid the combination entirely. Before starting nabumetone, tell your prescriber and pharmacist about every medication you take — including over-the-counter drugs, vitamins, and supplements.

Contraindicated Combinations (Do Not Use Together)

Ketorolac (Toradol, Sprix): Taking nabumetone with ketorolac (another NSAID) is contraindicated due to significantly increased risk of serious GI bleeding and kidney toxicity.

Other NSAIDs: Concurrent use of two NSAIDs (e.g., nabumetone plus ibuprofen or naproxen) is generally not recommended — it does not increase efficacy but does significantly increase GI and cardiovascular risk.

Major Interactions: Avoid or Use with Extreme Caution

Warfarin (Coumadin, Jantoven): Nabumetone can displace warfarin from protein binding sites and increase warfarin's anticoagulant effect. Combined use significantly raises the risk of serious GI bleeding. If both must be used, close INR monitoring is required.

Methotrexate (Trexall, Rheumatrex): NSAIDs reduce the kidney's ability to eliminate methotrexate, raising methotrexate blood levels and the risk of severe toxicity (blood, GI, kidney). Avoid concurrent use with high-dose methotrexate. Use caution even with low doses.

Lithium: NSAIDs reduce renal lithium clearance, leading to elevated lithium levels and risk of toxicity (tremor, confusion, cardiac arrhythmia). Monitor lithium levels closely if nabumetone is added or removed from the regimen.

Tacrolimus (Prograf): Co-administration increases nephrotoxicity risk. Avoid or monitor kidney function very closely.

Pemetrexed (Alimta): NSAIDs with long elimination half-lives (like nabumetone) should be discontinued at least 5 days before pemetrexed administration to avoid serious toxicity.

Moderate Interactions: Use with Caution and Monitoring

ACE inhibitors (lisinopril, enalapril, captopril, etc.): NSAIDs reduce the blood pressure-lowering effect of ACE inhibitors by blocking prostaglandin-mediated vasodilation. Monitor blood pressure. Concurrent use can also impair kidney function, especially in elderly patients or those with dehydration.

Angiotensin II receptor blockers (ARBs — losartan, valsartan, etc.): Same mechanism as ACE inhibitors — nabumetone may blunt antihypertensive effect and impair kidney function.

Diuretics (furosemide, hydrochlorothiazide, etc.): NSAIDs can reduce the natriuretic (sodium-eliminating) effect of diuretics, which may worsen fluid retention, edema, or hypertension. Monitor response.

SSRIs/SNRIs (fluoxetine, sertraline, venlafaxine, duloxetine, etc.): Combined use with antidepressants that affect serotonin increases GI bleeding risk, as both NSAIDs and SSRIs/SNRIs affect platelet function through different mechanisms.

Oral corticosteroids (prednisone, dexamethasone): Using steroids and NSAIDs together significantly increases the risk of GI ulceration and bleeding. This combination should be used with caution and usually with a proton pump inhibitor (PPI) for stomach protection.

Aspirin: Concurrent aspirin reduces nabumetone's protein binding and increases GI bleeding risk. If low-dose aspirin is required for cardiovascular protection, discuss alternatives with your prescriber.

Beta-blockers (atenolol, metoprolol, etc.): NSAIDs may blunt the blood pressure-lowering effect of beta-blockers. Monitor blood pressure more closely.

Food and Lifestyle Interactions

Alcohol: Alcohol increases the risk of GI bleeding with NSAIDs. Avoid alcohol or limit use significantly while taking nabumetone.

Sunlight/photosensitivity: Nabumetone may make your skin more sensitive to sunlight. Use sunscreen and avoid prolonged sun exposure and tanning beds.

Food/milk with nabumetone: Taking nabumetone with food or milk speeds absorption slightly and may reduce stomach discomfort. Total drug levels are not significantly changed.

What to Tell Your Doctor Before Starting Nabumetone

Always mention:

All prescription medications, including heart medications, antidepressants, and immunosuppressants

Over-the-counter pain relievers (ibuprofen, naproxen, aspirin)

Blood thinners (warfarin, apixaban, rivaroxaban)

Vitamins, supplements, and herbal products (some herbal supplements like fish oil can increase bleeding risk)

Any history of stomach ulcers, GI bleeding, kidney disease, liver disease, or heart disease

For a complete overview of nabumetone risks and warnings, see our nabumetone side effects guide. If you need help finding nabumetone in stock near you, visit medfinder.com.