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

Meloxicam is a powerful anti-inflammatory that can interact with a variety of common medications. Some of these interactions are serious — potentially life-threatening — while others are moderate and manageable with monitoring. Before starting meloxicam, it's essential to give your prescriber and pharmacist a complete list of everything you take, including prescription drugs, over-the-counter medications, vitamins, and herbal supplements.

Contraindicated Combinations (Do Not Use Together)

Other NSAIDs (ibuprofen, naproxen, aspirin at high doses, ketorolac): Combining meloxicam with any other NSAID significantly increases the risk of GI bleeding, stomach ulcers, and kidney damage. This includes OTC NSAIDs. Do not take both. Note: low-dose aspirin (81 mg/day) for cardiac prophylaxis is often continued alongside meloxicam under physician guidance, but it increases the risk of GI complications and is generally not recommended routinely.

Sodium polystyrene sulfonate (Kayexalate) + meloxicam oral suspension: The sorbitol in the oral suspension can cause intestinal necrosis (possibly fatal) when combined with Kayexalate. This is a contraindicated combination.

Serious Interactions (Require Close Monitoring or Dose Adjustment)

Warfarin (Coumadin) and other anticoagulants: Meloxicam can increase bleeding risk when taken with warfarin. The combination has synergistic GI bleeding effects. While meloxicam does not alter warfarin pharmacokinetics significantly, individual patients may see changes in INR. Monitor INR closely when starting or adjusting meloxicam. This applies to other anticoagulants (apixaban, rivaroxaban, etc.) as well.

Lithium: NSAIDs, including meloxicam, inhibit renal prostaglandin synthesis, which reduces lithium clearance and can elevate lithium plasma levels to toxic levels. Lithium toxicity symptoms include tremor, nausea, diarrhea, confusion, and muscle twitching. If you take lithium, your doctor may need to adjust your dose and monitor blood levels closely when adding meloxicam.

Methotrexate: NSAIDs can reduce the renal clearance of methotrexate, potentially enhancing its toxicity. Patients on high-dose methotrexate (for cancer) face the highest risk. For patients on low-dose methotrexate (for RA), the interaction is less pronounced but warrants monitoring for signs of toxicity.

Moderate Interactions (Use With Caution)

ACE inhibitors and ARBs (lisinopril, losartan, enalapril, etc.): NSAIDs can blunt the antihypertensive effects of ACE inhibitors and ARBs. The combination may also increase the risk of acute kidney injury, especially in elderly or volume-depleted patients. Blood pressure and kidney function should be monitored when these drugs are used together.

Diuretics (furosemide, thiazides): NSAIDs can reduce the natriuretic effect of diuretics, potentially worsening fluid retention and blood pressure control. Monitor blood pressure and edema in patients taking both.

SSRIs and SNRIs (sertraline, fluoxetine, duloxetine, venlafaxine, etc.): Combining SSRIs/SNRIs with NSAIDs increases the risk of GI bleeding, likely because serotonin affects platelet aggregation. If you take an antidepressant and need meloxicam, your doctor may consider a proton pump inhibitor (PPI) for GI protection.

Corticosteroids (prednisone, dexamethasone): The combination of corticosteroids and NSAIDs substantially increases GI bleeding risk. This combination should be used with caution and usually warrants gastroprotective therapy (PPI).

Cyclosporine and tacrolimus (transplant medications): NSAIDs can increase the nephrotoxic effect of cyclosporine and tacrolimus. Renal function should be closely monitored in transplant patients taking meloxicam.

Food and Alcohol Interactions

Alcohol: Drinking alcohol while taking meloxicam significantly increases the risk of GI bleeding and stomach ulcers. Avoid or strictly limit alcohol while on meloxicam.

Food: Food does not significantly affect meloxicam absorption. A high-fat meal may slightly increase peak concentrations (Cmax by ~22%) but doesn't change overall drug exposure. Taking it with food can reduce stomach upset.

Supplements to Mention to Your Doctor

Fish oil (omega-3 fatty acids): High-dose fish oil has antiplatelet effects and may increase bleeding risk when combined with NSAIDs.

Ginkgo biloba, garlic, vitamin E: These supplements have antiplatelet properties and can enhance bleeding risk when combined with meloxicam.

What to Tell Your Doctor and Pharmacist Before Starting Meloxicam

All prescription medications — especially blood thinners, lithium, methotrexate, heart/blood pressure drugs, immunosuppressants

All OTC medications — particularly ibuprofen, naproxen, aspirin, and antacids

All supplements — vitamins, fish oil, herbal remedies

Your medical history — especially kidney disease, liver disease, heart disease, history of ulcers or GI bleeding

For more detail on meloxicam's side effects, see: Meloxicam Side Effects: What to Expect and When to Call Your Doctor. If you need help locating meloxicam at a nearby pharmacy, medfinder can help.