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Beta blocker used to treat glaucoma in dogs and cats as well as to prevent glaucoma in the normal eye in patients with glaucoma in only one eye.
Used to treat glaucoma and prevent glaucoma in the normal eye in patients with glaucoma in one eye.
Betimol, Cosopt, Istalol, Timoptic
Dogs and cats
Timolol maleate, timolol hemihydrate, (S)-timolol, timololum
Ocular
Yes
Likely safe in pregnancy, timolol is excreted in the milk.
Rare
Timolol ophthalmic preparation is a beta blocker used to treat or prevent glaucoma in dogs and cats.
Glaucoma, prevention of glaucoma in normal eye in patients with glaucoma in only one eye, reducing the pressure within the treated eye.
Timolol reduces the pressure within the treated eye by causing a reduction in the amount of aqueous humor (the fluid within the eye) that is produced.
Dogs and Cats: One drop in affected eye(s) every 12 hours.
The medication dosages listed represent the variation in dosing for all underlying medical conditions.
Medications should only be administered to pets under the direct guidance of a veterinarian.
Timolol ophthalmic preparation is available as 0.25 and 0.5 percent solutions for use in the eyes.
Timolol should be stored at room temperature and protected from light and freezing temperatures.
Timolol should decrease the pressure within treated eyes by 25-30 percent. Pet parents should see improvement in their pet’s signs of glaucoma.
If a dose is missed, continue with the next dosage at the scheduled time.
Overdosage is rare but signs would include drowsiness, low blood pressure, slow heart rate and vertigo.
If you believe your pet has received an overdose of timolol, contact your veterinarian immediately for appropriate treatment.
Rare, but may include the following:
Do not use in pets with:
The following drugs may have increased effect when used in conjunction with timolol to lower the pressure within the eye:
Timolol ophthalmic preparation given with systemic beta blockers may lower blood pressure.
If timolol ophthalmic preparation is given with calcium channel blockers, it may have additive effects upon the heart.
When applying timolol ophthalmic preparation, do not allow the tip of the container to touch the eye or surrounding tissues.
Plumb’s Veterinary Drug Handbook
Disclaimer
The information contained on this page is for educational purposes only. This medication should only be given under the advice of a veterinarian who has examined your pet under the laws applicable to your state of residence.