Trusopt (Dorzolamide)

Trusopt (Dorzolamide)

Also known as: Trusopt
Active ingredient: Dorzolamide
Product Code: Trusopt 2% Eye Drops 5 ml (Dorzolamide)
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This medicine contains 20 mg/mL the active ingredient dorzolamide which belongs to group of medicines called carbonic anhydrase inhibitors. These medicines block the action of carbonic anhydrase enzyme which is responsible for the production of aqueous humour (fluid in the front part of the eye) that causes high pressure within your eye. Dorzolamide is prescribed for the treatment of glaucoma (damage of the optic nerve at the back of the eye caused by high pressure in the eye) and ocular hypertension.

Is Dorzolamide suitable for me?

Dorzolamide is not suitable for everyone. Do not use it

  • if you are allergic (hypersensitive) to dorzolamide or any of the other ingredients of this medicine
  • if you have serious kidney problems

In particular, you must tell the doctor if you:

  • have liver problems
  • have a problem in the surface layer of the eye
  • have had, or planning to have eye surgery
  • have suffered an eye injury or have an eye infection 
  • have a history of kidney stones
  • are taking orally another carbonic anhydrase inhibitor such as acetazolamide 
  • wear contact lenses
  • are pregnant or breast-feeding
  • have high blood acidity (hyperchloraemic acidosis)

Dorzolamide interacts with other medicines. It is most important that you tell the doctor all the medications and herbal supplements that you are currently taking.

See the package leaflet for a complete list of possible contraindications and warnings.

How should I take Dorzolamide?

This medicine is available in form of eye drops.

You should take dorzolamide exactly as instructed by your doctor or pharmacist.

  • If used alone, the usual dose is one drop in the affected eye(s) three times a day.

Do not use more of it, do not use it more often, or do not use it for a longer time than your doctor instructed. Also, this medicine works best if there is a constant amount in the blood. To help keep this amount constant, do not miss any doses and take the medicine at the same time each day. Do not take two doses together if you miss a dose.

Read the information leaflet provided with your medication for additional information. Talk to your doctor if you have any additional questions.

What are Dorzolamide side effects?

Like all medicines dorzolamide can cause side effects, including:

Very common:

  • itching, burning and stinging of the eyes


  • sore eye and blurred vision,
  • inflammation or swelling of the surface layer of the eye(s)
  • inflammation of the eyelid(s) and/or skin around the eye(s)
  • watering or itching of the eye(s)
  • blurred vision
  • feeling sick, bitter taste
  • weakness, fatigue
  • headache


  • inflammation of the middle layer of the eye

Consult a doctor if the side effects are severe. See the package leaflet for a complete list of side effects.