Timolol (eye): uses, side effects & brands

Written & medically reviewed by Dr. Sanjay Anbu, MBBS · Last reviewed 5 November 2026

Timolol eye drops lower eye pressure in glaucoma. It belongs to the Eye (ophthalmic) medicine group. Eye drops and ointments treat glaucoma, infections, allergy, inflammation or dryness of the eyes.

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Drug type — dosing is set by your doctor

Measure	Range
Drug class	Eye (ophthalmic) medicine
Type	Prescription
Dose	Individual — ask your doctor or pharmacist

What it is used for

Open-angle glaucoma
Raised eye pressure (ocular hypertension)
Combined with other drops when one is not enough

Common brand names

India: Iotim, Glucomol, Timolet
Worldwide: Timoptic

Common side effects

Brief stinging or burning
Blurred vision
Dry eyes
Tiredness or slow pulse (some is absorbed into the body)

Before taking it — precautions

Asthma or COPD — timolol can trigger wheezing and is usually avoided
Tell your doctor about slow heartbeat, heart block or heart failure
Tell your doctor if you take beta-blocker tablets or have diabetes

When to see a doctor urgently

Wheezing or breathlessness (urgent)
Very slow pulse, fainting or severe dizziness (urgent)
Eye pain, swelling or allergy around the eye

Not a prescription — no dose shown. The right dose of timolol depends on age, weight, kidney/liver function and the condition, so MedDroid does not show a dose here. Always get your dose from a doctor or pharmacist and the leaflet inside the pack. General educational information only.

Frequently asked questions

Can an eye drop affect my heart or lungs?

Yes — timolol is a beta-blocker and some reaches the bloodstream. Pressing the inner corner of the eye after the drop reduces this.

Can I use timolol if I have asthma?

Usually not, as it can cause serious wheezing. Tell your eye doctor about any breathing problem.

Can I stop if my eyes feel fine?

No — glaucoma is usually silent. Keep using it and attend pressure checks.

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Sources & further reading

Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.