What You Need to Know About Iyuzeh Drug Interactions

Iyuzeh (preservative-free Latanoprost) is a once-daily eye drop used to lower eye pressure in people with open-angle glaucoma or ocular hypertension. Because it's applied directly to the eye rather than taken by mouth, Iyuzeh has fewer systemic drug interactions than many other medications. But that doesn't mean there are none.

This guide covers the medications, supplements, and substances that can interact with Iyuzeh — and what to tell your doctor before starting treatment.

How Drug Interactions Work with Eye Drops

When you put an eye drop in your eye, most of the medication stays in the eye and surrounding tissue. However, a small amount can be absorbed into your bloodstream through the mucous membranes and tear duct. This means:

• Local interactions (in the eye) are the main concern — other eye drops or solutions that are used at the same time can interfere with Iyuzeh
• Systemic interactions (throughout the body) are minimal but not zero

The biggest interaction risks with Iyuzeh involve other ophthalmic medications used at the same time.

Medications That Interact with Iyuzeh

Major Interactions

Other prostaglandin analog eye drops

Do not use Iyuzeh at the same time as other prostaglandin analog eye drops. Using two prostaglandin analogs together can reduce the IOP-lowering effect of both, or even cause a paradoxical increase in eye pressure. Medications to avoid combining with Iyuzeh include:

• Bimatoprost (Lumigan)
• Travoprost (Travatan Z)
• Latanoprostene Bunod (Vyzulta)
• Tafluprost (Zioptan)
• Generic Latanoprost (Xalatan) — this is the same active ingredient as Iyuzeh, so using both would be doubling up

If your doctor is switching you from one of these medications to Iyuzeh, they'll typically have you stop the old drop and start Iyuzeh the next day.

Eye drops containing Thimerosal

Thimerosal is a mercury-based preservative found in some older eye drop formulations. When mixed with Latanoprost, precipitation (clumping) can occur. While Thimerosal is less common in modern eye drops, let your doctor know if you use any eye products that contain it. Wait at least 5 minutes between applying different eye drops to minimize this risk.

Moderate Interactions

Topical ophthalmic NSAIDs

Non-steroidal anti-inflammatory eye drops — such as Ketorolac (Acular), Bromfenac (Prolensa), or Nepafenac (Nevanac) — may increase the risk of macular edema when used with prostaglandin analogs like Iyuzeh. This is especially relevant for patients who have had cataract surgery or have other risk factors for macular edema.

If you need an NSAID eye drop (for example, after eye surgery), your doctor will weigh the risks and monitor you closely.

Safe to Use Together

Iyuzeh is commonly used alongside other classes of glaucoma medications without significant interactions. These include:

• Beta-blocker eye drops — Timolol (Timoptic), Betaxolol (Betoptic)
• Alpha-agonist eye drops — Brimonidine (Alphagan P)
• Carbonic anhydrase inhibitor eye drops — Dorzolamide (Trusopt), Brinzolamide (Azopt)
• Rho kinase inhibitor eye drops — Netarsudil (Rhopressa)
• Combination drops — Cosopt (Dorzolamide/Timolol), Combigan (Brimonidine/Timolol), Simbrinza (Brinzolamide/Brimonidine)

When using multiple eye drops, always wait at least 5 minutes between each one to allow proper absorption.

Supplements and OTC Medications to Watch

Because Iyuzeh works locally in the eye with minimal systemic absorption, there are no major known interactions with oral supplements or over-the-counter medications. However, keep these general points in mind:

• Artificial tears and lubricant eye drops — These are safe to use with Iyuzeh. Apply them at least 5 minutes apart. Since Iyuzeh is preservative-free, combining it with preservative-free artificial tears is ideal for patients with dry eye.
• Oral NSAIDs (Ibuprofen, Naproxen) — While oral NSAIDs don't directly interact with Iyuzeh eye drops, they have mild antiplatelet effects. If you're having eye surgery, your doctor may ask you to stop them temporarily.
• Eye health supplements (Lutein, Zeaxanthin, Omega-3) — No known interactions with Iyuzeh. These can be continued.

Food and Drink Interactions

Iyuzeh has no known food or drink interactions. Since it's an eye drop and not an oral medication, what you eat or drink doesn't affect how it works. You can use Iyuzeh at any time in the evening regardless of meals.

What to Tell Your Doctor

Before starting Iyuzeh, make sure your doctor knows about:

• All eye drops you currently use — Including prescription drops, artificial tears, and any eye products purchased over the counter
• Recent or upcoming eye surgery — Especially cataract surgery, which can increase the risk of macular edema with prostaglandin use
• History of herpes simplex keratitis — Latanoprost can potentially reactivate herpes infections in the eye
• Contact lens use — Remove contacts before using Iyuzeh and wait 15 minutes before reinserting
• Pregnancy or breastfeeding — The safety of Iyuzeh during pregnancy has not been well established
• Allergies — Especially any previous reactions to Latanoprost or other prostaglandin eye drops

Bring a list of all your medications — oral and topical — to every eye appointment. Even medications that seem unrelated to your eyes can sometimes be relevant.

Final Thoughts

Iyuzeh has a relatively clean interaction profile compared to many oral medications. The most important thing to avoid is combining it with other prostaglandin analog eye drops, which can actually make both medications less effective.

For most patients, Iyuzeh works well alongside other classes of glaucoma drops and doesn't interfere with common oral medications, supplements, or foods. When in doubt, talk to your eye doctor or pharmacist.

If you're looking for more information, check out our guides on Iyuzeh side effects and what Iyuzeh is and how to use it. And if you need help finding Iyuzeh at a pharmacy, Medfinder can show you which locations near you have it in stock.