Non-selective beta-1/beta-2 adrenergic antagonist that reduces aqueous humor production by the ciliary body (beta-2 receptor blockade decreases cAMP-mediated aqueous secretion). Lowers IOP ~20–25% without affecting pupil size or accommodation.
At a glance
Class
Ophthalmic Non-Selective Beta-Blocker
Storage
Store at room temperature, protect from light
Dosing
Used for chronic glaucoma — often combined with dorzolamide (Cosopt = dorzolamid
Educational reference only
This information is provided for educational purposes and is not a substitute for professional veterinary advice, diagnosis, or treatment. Always consult a qualified veterinarian before administering any medication to your pet.
Find a vet near you →Safety
IOPHeart rate (systemic beta-blockade)Respiratory effort (asthmatic patients — AVOID)Schirmer tear test
Educational reference only
This information is provided for educational purposes and is not a substitute for professional veterinary advice, diagnosis, or treatment. Always consult a qualified veterinarian before administering any medication to your pet.
Find a vet near you →Interactions
No documented interactions.
FAQs
Frequently asked questions
›What is Timolol Ophthalmic?
Timolol Ophthalmic is a ophthalmic non-selective beta-blocker used in pets. Non-selective beta-1/beta-2 adrenergic antagonist that reduces aqueous humor production by the ciliary body (beta-2 receptor blockade decreases cAMP-mediated aqueous secretion). Lowers IOP ~20–25% without affecting pupil size or accommodation.
›What is Timolol Ophthalmic used for in pets?
Timolol Ophthalmic is used in veterinary medicine for: Used for chronic glaucoma — often combined with dorzolamide (Cosopt = dorzolamid; Use 0.
›What is the Timolol Ophthalmic dose for dogs?
For dogs, Timolol Ophthalmic is typically dosed as follows — Used for chronic glaucoma — often combined with dorzolamide (Cosopt = dorzolamid: undefined undefined Ophthalmic q12h. Always consult your veterinarian for a dose tailored to your pet's weight, age, and condition.
›What is the Timolol Ophthalmic dose for cats?
For cats, Timolol Ophthalmic is typically dosed as follows — Use 0: undefined undefined Ophthalmic q12h. Always consult your veterinarian for a dose tailored to your pet's weight, age, and condition.
›Does Timolol Ophthalmic need a prescription?
Yes. Timolol Ophthalmic is a prescription medication and should only be administered under veterinary supervision.
Educational reference only
This information is provided for educational purposes and is not a substitute for professional veterinary advice, diagnosis, or treatment. Always consult a qualified veterinarian before administering any medication to your pet.
Find a vet near you →References
References
The PetCare.AI drug reference is built from 13 authoritative sources cited across 580 drug monographs.
Textbooks & handbooks — 5
- Plumb's Veterinary Drug Handbook
- Withrow & MacEwen's Small Animal Clinical Oncology
- Merck Veterinary Manual
- NRC Nutrient Requirements of Dogs and Cats
- Veterinary Pharmacology and Therapeutics (Riviere & Papich)
Clinical guidelines & consensus — 4
- ASPCA Animal Poison Control Center Guidelines
- AAHA Diabetes Management Guidelines
- ASPCA Poison Control Guidelines
- RECOVER CPR Guidelines
Journals & peer-reviewed studies — 2
- EPIC Study (J Vet Intern Med 2016)
- JVIM FAT CAT Study
Regulatory & approvals — 1
- CDSCO Veterinary Drug Approval Registry (1969–2026)
Databases — 1
- Washington State University VCPL MDR1 Database