What is timolol ophthalmic?
Timolol ophthalmic is used to reduce intraocular pressure (pressure within the eye) in cats and dogs with glaucoma. Timolol ophthalmic is also used to prevent glaucoma in the normal eye of an animal with unilateral (one-sided) glaucoma.
It is used off label (extra label) in veterinary medicine. Many drugs are commonly prescribed for off-label use in veterinary medicine. “Off label” means the drug is being used in a way that has not been reviewed or approved by the U.S. Food and Drug Administration (FDA) or Health Canada. In these instances, follow your veterinarian’s directions and cautions carefully, as they may be significantly different from those on the label.
How do I give my pet timolol ophthalmic?
Timolol ophthalmic comes in gel and liquid eye drop suspension form.
- Liquid drops and gels are given topically, directly into the eye.
- Wash your hands before giving your pet this medication.
- Do not allow the dropper tip to touch your animal’s eye or any other surface to prevent contamination.
- If you are administering more than one eye medication, wait 5 to 10 minutes between each medication. Give eye drops before eye ointments.
- Give this medication to your pet for the entire time prescribed by your veterinarian, even if it appears that your pet is feeling better.
What if I miss giving my pet the medication?
If you miss a dose, give it as soon as you remember, and then continue with the regular dosing schedule. However, if it is almost time for the next dose, skip the missed dose and resume the regular dosing schedule. Do not give the pet two doses at once.
Are there any potential side effects from timolol ophthalmic?
Timolol ophthalmic may cause the following side effects:
- irritation, swelling, itching, pain, or reddening in or around the eyes
- smaller pupil size
The following reactions are rare; if they occur, contact your veterinarian immediately:
- an allergic reaction such as irregular breathing, rash, fever, puffiness and swelling around the face
- asthma attack in cats (wheezing, coughing, changes in breathing or gum color)
Drug sensitivities can develop over time with repeated exposure. Your pet may have no reaction after the first few doses but may develop a sensitivity later. It is important to watch for signs of an allergic reaction over the entire course of treatment.
Other side effects may occur. If you notice anything unusual, contact your veterinarian immediately. This medication takes effect within a few hours and should stop working within 24 hours.
Are there any risk factors for this medication?
Timolol ophthalmic should NOT BE USED in animals allergic to any component.
Timolol ophthalmic should be USED WITH CAUTION in animals that:
- have asthma or bronchitis
- have a heart condition
- have a thyroid condition or diabetes
- are pregnant or nursing
- are going to have surgery or anesthesia, including dental procedures
Are there any drug interactions I should be aware of?
Certain medications should be USED WITH CAUTION when given with timolol ophthalmic, including:
- antidepressants (e.g., fluoxetine, venlafaxine)
- clonidine
- digoxin
- oral beta-blockers (e.g., atenolol)
Be sure to tell your veterinarian about any medications (including vitamins, supplements, or herbal therapies) that your pet is taking before starting any new treatment.
Is any monitoring needed with this medication?
- Your veterinarian will measure your pet’s intraocular pressure.
- Your veterinarian may schedule a follow-up visit for after the course of medication is complete to ensure the condition has been cleared and/or do additional testing to ensure this is the right medication for the type of condition present. In this case, follow your veterinarian’s directions.
- At home, monitor for any abnormal changes. If these occur, discontinue the medication and contact your veterinarian.
How do I store timolol ophthalmic?
- Store in the original container at room temperature of 15°C-25°C (59°F-77°F).
- Protect from light and moisture.
- Do not freeze.
- Discard medication if it becomes cloudy or changes color.
- Follow storage and expiration recommendations for specially compounded formulas.
- Keep medication out of reach of children and pets.
What should I do in case of emergency?
If you suspect an overdose or an adverse reaction to the medication, call your veterinary office immediately. If they are not available, follow their directions in contacting an emergency facility.
