What is Natacyn: Uses, Warnings & Interactions

Updated May 14, 2025  •  Published Dec 30, 2020

Natacyn overview

BRAND NAMES:

  • Natacyn

Generic Names:

  • Natacyn

Uses:

  • Treats eye infections that are caused by fungus.

Therapeutic Classes:

  • Antifungal

Forms:

  • Liquid, Drop

How it’s taken:

  • Into the eye

What is Natacyn used for?

What form(s) does Natacyn come in

  • Liquid

  • Drop

What are common Natacyn doses?

  • Bottle 15ML of 5%

Common Natacyn prescriptions

  • Natacyn
    15ml of 5% bottle

How to take Natacyn

  • Ophthalmic routeTo use the eye drops: Hold the dropper close to your eye with the other hand. Drop the correct number of drops into the pocket made between your lower lid and eyeball. Gently close your eyes. Place your index finger over the inner corner of your eye for 1 minute. Do not rinse or wipe the dropper or allow it to touch anything, including your eye. Put the cap on the bottle right away. Keep the bottle upright when you are not using it.

  • Your doctor will tell you how much medicine to use. Do not use more than directed.

  • Take all of the medicine in your prescription to clear up your infection, even if you feel better after the first few doses.

  • Ophthalmic routeWash your hands with soap and water before and after using this medicine.

  • Ophthalmic routeShake the eye drops well just before each use.

  • Ophthalmic routeLie down or tilt your head back. With your index finger, pull down the lower lid of your eye to form a pocket.

  • Your doctor will tell you how much medicine to use. Do not use more than directed.

  • Ophthalmic routeWash your hands with soap and water before and after using this medicine.

  • Ophthalmic routeTo use the eye drops: Hold the dropper close to your eye with the other hand. Drop the correct number of drops into the pocket made between your lower lid and eyeball. Gently close your eyes. Place your index finger over the inner corner of your eye for 1 minute. Do not rinse or wipe the dropper or allow it to touch anything, including your eye. Put the cap on the bottle right away. Keep the bottle upright when you are not using it.

  • Ophthalmic routeShake the eye drops well just before each use.

  • Ophthalmic routeLie down or tilt your head back. With your index finger, pull down the lower lid of your eye to form a pocket.

  • Take all of the medicine in your prescription to clear up your infection, even if you feel better after the first few doses.

What to do if you miss a dose of Natacyn

  • Take a dose as soon as you remember. If it is almost time for your next dose, wait until then and take a regular dose. Do not take extra medicine to make up for a missed dose.

  • Ophthalmic routeAsk your pharmacist, doctor, or health caregiver about the best way to dispose of the used medicine container and any leftover medicine after you have finished your treatment. You will also need to throw away old medicine after the expiration date has passed.

  • Keep all medicine out of the reach of children. Never share your medicine with anyone.

Natacyn contraindications

  • You should not use this medicine if you have ever had an allergic reaction to natamycin or benzalkonium (a preservative).

Natacyn warnings

  • Make sure your doctor knows if you are pregnant or breast feeding.

  • Your doctor will check your progress and the effects of this medicine at regular visits. Keep all appointments.

  • Call your doctor if your symptoms do not improve or if they get worse.

Natacyn interactions

  • Make sure your doctor knows if you are pregnant or breast feeding.

  • Your doctor will check your progress and the effects of this medicine at regular visits. Keep all appointments.

  • Call your doctor if your symptoms do not improve or if they get worse.

Natacyn side effects

Serious Side Effects

  • Severe eye redness or swelling that was not there before you started using the medicine.

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