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Timolol

Timolol is a beta blocker supplied as an eye drop to bring down pressure inside the eye. It is a non-selective beta-adrenergic antagonist, blocking beta receptors without choosing between subtypes. It is used in open-angle glaucoma and ocular hypertension.

Medicine containing Timolol

Timolol Eye Drops

Open-angle Glaucoma, Ocular Hypertension

0.5%

Timolol eye drops lower pressure in open-angle glaucoma and ocular hypertension. The bottle is supplied in a single strength, pack sizes vary. You see the price per bottle for each option.

FromUS$7.08/ bottleView

Key points

  • Timolol lowers intraocular pressure by reducing how much aqueous humour the ciliary body produces.
  • Its effect starts within 20 to 30 minutes and lasts between 12 and 24 hours.
  • Being non-selective, enough timolol can reach the circulation to cause systemic beta-blockade, so heart and lung history is checked first.

What timolol is used for

Raised pressure inside the eye is the target. Timolol is used for open-angle glaucoma and ocular hypertension, and sits within the wider group of glaucoma treatments. Keeping the pressure steady is the aim; these drops belong to a long-term plan rather than a short course. They also appear among the medicines in eye care.

How timolol works

The ciliary body makes the fluid that fills the front of the eye. Timolol blocks beta-adrenergic receptors there, which slows aqueous humour production. With less fluid entering the eye, intraocular pressure falls. Onset is measured in tens of minutes, and one application covers roughly half a day to a full day.

Timolol eye drops available here

Timolol Eye Drops contain timolol 0.5% in a bottle, prepared as a solution for the eye. Pharmacy partners in India ship to Malaysia in discreet packaging.

Safety

The drops should not be used by anyone with a history of asthma, severe chronic obstructive pulmonary disease, bradycardia or cardiogenic shock. Timolol can act on the body beyond the eye, so systemic beta-blockade effects are a recognised concern.

Minor effects include eye irritation, dry eyes and blurred vision. Conjunctivitis and blepharitis are moderate effects. Bradycardia and bronchospasm are serious and need immediate medical attention.

Calcium channel blockers and oral beta blockers can interact with timolol. Tell your doctor about every medicine you use in the eye as well as those taken by mouth. Remove contact lenses before applying the drops. Use with caution in elderly patients. In pregnancy, timolol is used only when the benefits outweigh the risks; it is distributed into breast milk, so breastfeeding calls for caution.

Further reading

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