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Mar 11, 2024

Healthy Aging

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Timolol for Glaucoma and Ocular Hypertension

Timolol brand names: Betimol, Istalol, Timoptic Ocudose, Timoptic Ocumeter

Timolol Uses

Timolol (pronunciation: tai·muh·laal) treats pressure inside the eye caused by glaucoma, ocular hypertension, hemangioma, and other eye diseases. Treating high pressure in the eye helps to prevent blindness.

Pressure in the eye

Timolol belongs to the drug class called beta blocker. It works by blocking certain natural substances' effects on the eye and reducing the amount of fluid produced.

This medication is offered as timolol maleate and timolol hemihydrate. The difference between the two is only the non-active solution ingredients. Both medications function in the same way.

There is also a combination medication called timolol dorzolamide (also known by its brand name Cosopt).


Timolol is an eye drop medication. The typical dosage is 1 drop in each affected eye, twice daily. This may change depending on your responsiveness to the medication.

Side Effects

Some possible side effects of timolol eye drops are:

  • Eye irritation
  • Low blood sugar
  • Difficulty sleeping
  • Tinnitus
  • Low blood pressure
  • Difficulty breathing, coughing
  • Nausea, vomiting, diarrhea
  • Decreased sex drive
  • Hair loss
  • Rash
  • Weakness, tiredness
  • Slow heartrate

Speak to your healthcare provider if you experience any of these side effects, or any new or worsening symptoms after starting this medication.


Certain medications may interact with timolol. Check with your healthcare provider if any medication you are currently taking interacts with timolol. Some medications that may interact with this medication are:

Get Timolol for Less at Marley Drug

Marley Drug offers the same 15ml eye dropper for less shipped directly to you. With no insurance needed, Marley Drugs make your prescriptions affordable and easy, saving you time and money on your medications.

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