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

Nevanac (nepafenac 0.1%) is an eye drop, which means its systemic absorption is very low. However, it can still interact with certain medications — particularly those that affect bleeding, inflammation, or the corneal surface. Here's what every patient should know about Nevanac drug interactions before using it.

How Low Is Nevanac's Systemic Absorption?

After topical ocular application, Nevanac does reach the bloodstream in very small amounts. Studies show measurable plasma concentrations of nepafenac and amfenac approximately 2–3 hours after three-times-daily dosing. However, these concentrations are extremely low — far below the levels needed to cause the systemic effects associated with oral NSAIDs. Drug-drug interactions mediated through CYP enzyme metabolism or protein binding are considered unlikely.

Despite this reassuring profile, the following interactions are worth knowing about:

Interaction 1: Blood Thinners and Anticoagulants

Nevanac can interfere with platelet aggregation (the clumping of platelets that helps form blood clots), which may increase bleeding time. If you are taking any of the following, inform your doctor before using Nevanac:

Warfarin (Coumadin): A common blood thinner — increased bleeding risk with any NSAID

Apixaban (Eliquis): A direct oral anticoagulant (DOAC)

Rivaroxaban (Xarelto): Another DOAC commonly prescribed for atrial fibrillation or DVT prevention

Aspirin (daily low-dose or higher): May compound bleeding risk

This doesn't necessarily mean you can't use Nevanac if you're on a blood thinner — your surgeon will weigh the risk and may monitor you more closely. Many patients on anticoagulants do have cataract surgery and use post-operative NSAID drops safely.

Interaction 2: Aspirin and Other Oral NSAIDs

Taking aspirin or other oral NSAIDs (ibuprofen/Advil, naproxen/Aleve, celecoxib/Celebrex) while using Nevanac may increase the risk of:

Extended bleeding time, particularly around the time of eye surgery

Gastrointestinal side effects (though this is rare with topical ophthalmic NSAIDs given low systemic absorption)

Tell your ophthalmologist about any over-the-counter pain medications you use regularly, including aspirin, ibuprofen, or naproxen.

Interaction 3: Topical Corticosteroid Eye Drops

It is very common to be prescribed both Nevanac and a steroid eye drop (such as prednisolone acetate or dexamethasone) after cataract surgery. This combination is generally safe and even complementary — they work through different mechanisms and together provide stronger anti-inflammatory coverage than either alone.

However, concurrent use of topical NSAIDs and topical steroids may increase the potential for slowed or delayed wound healing. Your surgeon accounts for this in your post-operative care plan, but if you notice unusual healing issues, report them promptly.

Important: If you are using both Nevanac and a steroid drop, apply them at least 5 minutes apart. This allows adequate time for each drop to be absorbed before the next is added.

Interaction 4: Other Topical Ophthalmic Medications

After cataract surgery, many patients are using multiple eye drops simultaneously — antibiotics, steroids, and NSAIDs. Nevanac can safely be used alongside these other drops, but timing matters:

Wait at least 5 minutes between different eye drops. Applying multiple drops at once dilutes and washes out each medication before it can be absorbed properly.

Follow the sequence your doctor specifies. In general, thinner drops (like antibiotics) should be applied before thicker ones (like suspensions). Nevanac is a suspension.

Interaction 5: Contact Lenses and Their Preservative

Nevanac contains benzalkonium chloride (BAK) as a preservative. BAK is known to be absorbed by soft contact lenses and can discolor them or cause corneal surface irritation if contacts are worn during application. Always remove soft contact lenses before applying Nevanac drops, and wait at least 15 minutes before reinserting them. Hard (rigid gas-permeable) contact lenses have the same recommendation.

What to Tell Your Doctor Before Using Nevanac

Before your cataract surgery and Nevanac prescription, make sure your ophthalmologist knows if you:

Take any blood thinners or antiplatelet medications (warfarin, aspirin, Eliquis, Xarelto, Plavix)

Regularly take oral NSAIDs like ibuprofen or naproxen

Have diabetes, dry eye disease, or rheumatoid arthritis (which increase corneal risk)

Are allergic to aspirin or any other NSAID

Are pregnant or breastfeeding (especially in the last trimester of pregnancy)

The Bottom Line

Nevanac's minimal systemic absorption means few drug-drug interactions at the systemic level. The most important interactions to watch for are with blood thinners (bleeding risk) and concurrent topical ophthalmic medications (5-minute spacing rule). For a comprehensive look at Nevanac side effects, see Nevanac Side Effects: What to Expect and When to Call Your Doctor. Use medfinder to locate Nevanac at a pharmacy near you.