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Generic name: nedocromil ophthalmicne-DOK-roe-mil-off-THAL-mik ]
Drug class: Ophthalmic antihistamines and decongestants

Medically reviewed by on Aug 24, 2022. Written by Cerner Multum.

What is Alocril?

Nedocromil is an anti-allergic medicine that can reduces certain symptoms after you are exposed to an allergen.

Alocril (for the eyes) is used to treat itching of the eyes caused by allergies.

Alocril may also be used for purposes not listed in this medication guide.


Follow all directions on your medicine label and package. Tell each of your healthcare providers about all your medical conditions, allergies, and all medicines you use.

Before taking this medicine

You should not use Alocril if you are allergic to nedocromil.

This medicine is not expected to harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant.

It is not known whether nedocromil ophthalmic passes into breast milk or if it could harm a nursing baby. Tell your doctor if you are breast-feeding a baby.

Alocril is not approved for use by anyone younger than 3 years old.

How should I use Alocril?

Follow all directions on your prescription label. Do not use this medicine in larger or smaller amounts or for longer than recommended.

Do not use this medicine while wearing contact lenses. Alocril may contain a preservative that can discolor soft contact lenses. Wait at least 15 minutes after using this medicine before putting in your contact lenses.

Read all patient information, medication guides, and instruction sheets provided to you. Ask your doctor or pharmacist if you have any questions.

Wash your hands before using the eye drops.

To apply the eye drops:

  • Tilt your head back slightly and pull down your lower eyelid to create a small pocket. Hold the dropper above the eye with the tip down. Look up and away from the dropper and squeeze out a drop.

  • Blink several times to make sure the solution spreads over your eye. Then close your eyes and wipe away any excess solution with a clean tissue.

  • Use only the number of drops your doctor has prescribed. If you use more than one drop, wait about 5 minutes between drops.

  • Wait at least 10 minutes before using any other eye drops your doctor has prescribed.

Do not touch the tip of the eye dropper or place it directly on your eye. A contaminated dropper can infect your eye, which could lead to serious vision problems.

Do not use the eye drops if the liquid has changed colors or has particles in it. Call your pharmacist for new medicine.

Use this medicine for the full length of time you are exposed to allergens, even if you have no symptoms.

Store at room temperature away from moisture and heat. Do not freeze. Keep the bottle tightly closed when not in use.

What happens if I miss a dose?

Use the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not use extra medicine to make up the missed dose.

What happens if I overdose?

An overdose of Alocril is not expected to be dangerous. Seek emergency medical attention or call the Poison Help line at 1-800-222-1222 if anyone has accidentally swallowed the medication.

What should I avoid while using nedocromil ophthalmic?

Do not use other eye medications unless your doctor tells you to.

Alocril side effects

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Alocril may cause serious side effects. Stop using Alocril and call your doctor at once if you have:

  • severe burning, stinging, or irritation after using Alocril.

Common side effects of Alocril may include:

  • headache;

  • runny or stuffy nose;

  • eye redness;

  • your eyes may be more sensitive to light;

  • mild eye irritation after using the eye drops.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What other drugs will affect Alocril?

It is not likely that other drugs you take orally or inject will have an effect on nedocromil used in the eyes. But many drugs can interact with each other. Tell each of your healthcare providers about all medicines you use, including prescription and over-the-counter medicines, vitamins, and herbal products.

Further information

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.