Table of Contents > Drug > Timolol (Ophthalmic) Print

Timolol (Ophthalmic)


Related terms
Author information


    Related terms
    • Brand Names: U.S.: Betimol®;Istalol®;Timolol GFS;Timoptic-XE®;Timoptic®;Timoptic® in OcuDose®
    • Brand Names: Canada: Apo-Timop®;Dom-Timolol;Mylan-Timolol;Novo-Timol;PMS-Timolol;Sandoz-Timolol;Tim-AK;Timolol Maleate-EX;Timoptic-XE®;Timoptic®

    • It is used to treat glaucoma.
    • It is used to lower high eye pressure.
    • Timolol lowers pressure in the eye.


    How to take

    • All eye products:
    • For the eye only.
    • Take out contact lenses before using this drug. Lenses may be put back in 15 minutes after this drug is given. Do not put contacts back in if your eyes are irritated or infected.
    • Do not touch the container tip to the eye, lid, or other skin.
    • Gel:
    • Turn container upside down and shake once before each use.
    • Use other eye drugs 10 minutes before the gel.
    • Solution:
    • Tilt your head back and drop drug into the eye.
    • After use, keep your eyes closed. Put pressure on the inside corner of the eye. Do this for 1 to 2 minutes. This keeps the drug in your eye.
    • Space each eye drug by 5 minutes.

    Missed Dose

    • Use a missed dose as soon as you think about it.
    • If it is close to the time for your next dose, skip the missed dose and go back to your normal time.


    • Store at room temperature. Do not freeze.



    • If you have an allergy to timolol or any other part of this drug.
    • Tell your doctor if you are allergic to any drugs. Make sure to tell about the allergy and what signs you had. This includes telling about rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other signs.
    • If you have any of these health problems: Asthma, very weak heart, or slow heartbeat without a working pacemaker.


    • If you have high blood sugar (diabetes) and have low blood sugar, talk with your doctor. This drug hides the signs of low blood sugar except sweating.
    • If you have a weak heart, talk with your doctor.
    • Have an eye exam every year.
    • Have your eye pressure checked. Talk with your doctor.
    • Check all drugs you are taking with your doctor. This drug may not mix well with some other drugs.
    • Keep a list of all your drugs (prescription, natural products, vitamins, OTC) with you. Give this list to your doctor.
    • Tell your doctor if you are pregnant or plan on getting pregnant.
    • Tell your doctor if you are breast-feeding.

    Side Effects

    • Eye irritation.

    Contact a healthcare provider

    • If you think there was an overdose, call your local poison control center or ER right away.
    • Signs of a very bad reaction to the drug. These include wheezing; chest tightness; fever; itching; bad cough; blue or gray skin color; seizures; or swelling of face, lips, tongue, or throat.
    • Sudden change in eyesight, eye pain, or irritation.
    • Any rash.
    • Side effect or health problem is not better or you are feeling worse.

    General Statements

    • If you have a very bad allergy, wear an allergy ID at all times.
    • Do not share your drugs with others and do not take anyone else's drugs.
    • Keep all drugs out of the reach of children and pets.
    • Most drugs may be thrown away in household trash after mixing with coffee grounds or kitty litter and sealing in a plastic bag.
    • In Canada, take any unused drugs to the pharmacy. Also, visit to learn about the right way to get rid of unused drugs.
    • Keep a list of all your drugs (prescription, natural products, vitamins, OTC) with you. Give this list to your doctor.
    • Call your doctor for help with any side effects. If in the U.S., you may also call the FDA at 1-800-FDA-1088 or if in Canada, you may also call Health Canada's Vigilance Program at 1-866-234-2345.
    • Talk with the doctor before starting any new drug, including OTC, natural products, or vitamins.

    Author information
    • Copyright © 1978-2013 Lexi-Comp Inc. All rights reserved.

    Copyright © 2011 Natural Standard (

    The information in this monograph is intended for informational purposes only, and is meant to help users better understand health concerns. Information is based on review of scientific research data, historical practice patterns, and clinical experience. This information should not be interpreted as specific medical advice. Users should consult with a qualified healthcare provider for specific questions regarding therapies, diagnosis and/or health conditions, prior to making therapeutic decisions.