Active ingredient:


Drug description:

Cyclogyl causes dilation of the pupil.


Cyclogyl is used in domestic animals especially when they have an ulcer on their cornea (transparent superficial layer of the eye).

It relieves pain caused by the ulcer and prevents the iris (colored part of the eye) from sticking to the cornea.


Unless otherwise advised by a veterinarian, do not use this drug in animals that are allergic to it or in patients with glaucoma (increased pressure in the eye).

Please discuss with a veterinarian or consult the product monograph for more information on contraindications.

Side effects:

The animal may be sensitive to light because of the dilation of its pupil. In addition, he may feel a burning sensation when applying cyclogyl.

The product can also cause a decrease in the production of tears and make the pet drool. 

Please see the product monograph for additional side effects.

Recommended monitoring:

It is recommended that the state of the corneal ulcer be closely monitored.

Drug interactions:

Cyclogyl may interfere with the effectiveness of some other drugs if used at the same time. You can ask your veterinarian which ones.

Please also notify the veterinarian if your pet is already taking any medication(s) before starting treatment with cyclogyl. This will allow him or her to make sure that they are compatible.


Keep at room temperature, away from sun and moisture.

Do not refrigerate.

Formulations available:

Ophthalmic solution.


Wash hands after handling the product.

Clean the eye with a non-irritating solution indicated for this purpose before applying the medication.

Avoid touching the eye with the tip of the bottle and disinfect it with rubbing alcohol after each application.

Close the animal's eyelids and gently massage them for a few seconds to fully spread the product over the entire surface of the eye.

Prevent the animal from rubbing the area near the eyes after application. If necessary, make him wear an Elizabethan collar ("lampshade").

Discard any ophthalmic preparation 1 month after opening the bottle.

Apply solutions first and then ointments when different textures of ophthalmic medications are used at the same time.

Wait 5 minutes between the ocular products to allow time for each one to be absorbed.