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Trusopt/Dorzolamide

Trusopt (Dorzolamide) eye drop solution is a medicine used for the treatment of open-angle glaucoma and ocular hypertension. Its mechanism of action is the inhibition of carbonic anhydrase. The main active ingredient in Trusopt, Dorzolamide, irreversibly inhibits carbonic anhydrase at the level of the ciliary processes of the eye, which decreases the secretion of aqueous humor, probably by decreasing the formation of bicarbonate ions with the subsequent reduction of sodium and fluid transport. Your doctor will determine the appropriate dosage and duration of treatment. In the case of using it alone, the dose is 1 drop in the affected eye (s), in the morning, in the afternoon, and at night.

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Please note that whilst you are able to request the medicine strength and size required,
we will only be able to send on approval from our in house pharmacist.

Starts at £38.00
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Price Comparison

Select your preferred options and see the best price

PackPrice (£)
Trusopt Bottle 5ml-5ml x 1 Pack38.00
Trusopt Bottle 5ml-5ml x 2 Packs56.00
Trusopt Bottle 5ml-5ml x 3 Packs69.00
Trusopt Unit Dose 0.2ml-0.2ml x 6069.00
Trusopt Unit Dose 0.2ml-0.2ml x 120125.00
Trusopt Unit Dose 0.2ml-0.2ml x 180155.00

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Trusopt Eye Drops for Glaucoma and Eye Pressure Control

Managing high eye pressure early is important to protect your long-term vision. Trusopt eye drops are a well-established treatment designed to lower pressure inside the eye and slow the progression of glaucoma.

Trusopt drops (dorzolamide eye drops) belong to a group called carbonic anhydrase inhibitor medicines. They work differently from many other treatments, making them a useful option either on their own or alongside other therapies for effective IOP reduction.

What Are Trusopt Eye Drops Used For?

Trusopt eye drops are used to reduce raised pressure in the eye caused by glaucoma or ocular hypertension. High pressure inside the eye can damage the optic nerve over time if not controlled properly.

These prescription drops are commonly used for open-angle glaucoma, ocular hypertension, and long-term pressure control therapy. They may be used alone or combined with other glaucoma medicines when needed.

How Trusopt Eye Drops Work

Trusopt glaucoma treatment works by reducing the amount of fluid produced inside the eye. The active ingredient, dorzolamide, is a carbonic anhydrase inhibitor that works by slowing down fluid production in the eye and lowering pressure build-up. This provides steady and effective IOP reduction.

How to Use Trusopt Eye Drops

Trusopt drops are typically used multiple times a day, depending on your treatment plan. If used alone: usually one drop, three times daily. If used with another glaucoma medication: usually twice daily.

  • Wash your hands thoroughly.
  • Tilt your head back and pull down the lower eyelid.
  • Apply one drop into the eye.
  • Close your eye and press the inner corner for about 2 minutes.

Do not touch the dropper tip to your eye. Leave at least 10 minutes between different eye drops. Remove contact lenses before use and wait 15 minutes before reinserting. Use consistently for best pressure control results. Do not skip doses or stop suddenly, and attend regular eye pressure check-ups.

During your consultation at Pharmacy Planet, your prescriber will make sure you understand exactly how and when to use your drops for the best results.

Who Can Use Trusopt Eye Drops?

Trusopt eye drops are suitable for adults diagnosed with glaucoma or ocular hypertension. They are often recommended for people needing non-beta-blocker glaucoma medication, patients requiring additional pressure control drops alongside other treatments, and individuals who need consistent IOP reduction.

This treatment may not be suitable if you are allergic to dorzolamide or similar medicines, have severe kidney problems, or have a history of kidney stones. Use with caution if you have liver problems, have existing eye conditions or recent eye surgery, or wear contact lenses regularly.

Possible Side Effects of Trusopt Eye Drops

Like all glaucoma medications, Trusopt may cause side effects in some people.

Common Side Effects:

  • Burning or stinging in the eye
  • Eye irritation or redness
  • Blurred vision
  • Bitter taste in the mouth
  • Headache or fatigue

Less Common Side Effects:

  • Eye inflammation or swelling
  • Sensitivity to light
  • Nausea or dizziness

Serious Side Effects — Seek urgent care if you notice:

  • Swelling of the face, lips, or throat
  • Difficulty breathing
  • Severe skin reactions or rash

Trusopt eye drops can interact with other carbonic anhydrase inhibitor medicines, other glaucoma eye drops, and any prescription or over-the-counter medicines. Always provide a full medication list during your consultation.

Why People Choose Trusopt Eye Drops

Trusopt drops are a trusted option for people who need effective eye pressure control without relying on beta-blockers. People often choose Trusopt because it offers a different mechanism as a carbonic anhydrase inhibitor, can be used alone or with other treatments, supports steady IOP reduction, and is suitable for long-term ocular hypertension management.

How Does the Ordering Process Work at Pharmacy Planet?

Accessing Trusopt eye drops online is simple and safe.

  1. Complete a short consultation and answer a few medical questions about your eye condition.
  2. A qualified prescriber checks if Trusopt is suitable for you.
  3. If approved, your prescription drops are delivered discreetly to your address.
Trusopt Eye Drops

Trusopt (dorzolamide) is a carbonic anhydrase inhibitor eye drop that reduces fluid production inside the eye, providing steady IOP reduction as a standalone treatment or alongside other glaucoma therapies.

Used for open-angle glaucoma, ocular hypertension, and long-term pressure control therapy — alone or combined with other glaucoma medicines.

Dorzolamide is a carbonic anhydrase inhibitor that slows fluid production in the eye and lowers pressure build-up, providing steady IOP reduction.

Alone: one drop three times daily. With other glaucoma medication: twice daily. Wash hands, tilt head, apply one drop, press inner corner for 2 minutes. Leave 10+ minutes between different eye drops; remove contacts before use and reinsert after 15 minutes.

Suitable for adults with glaucoma or ocular hypertension, especially those needing non-beta-blocker medication or additional pressure control alongside other treatments.

Not suitable for allergy to dorzolamide, severe kidney problems, or kidney stone history. Caution for liver problems, existing eye conditions/recent surgery, or regular contact lens wearers.

Common: Burning/stinging, eye irritation/redness, blurred vision, bitter taste in mouth, headache/fatigue

Less common: Eye inflammation/swelling, light sensitivity, nausea/dizziness

Serious: Seek urgent care for face/lips/throat swelling, breathing difficulty, or severe skin reactions/rash

A trusted carbonic anhydrase inhibitor offering effective pressure control without beta-blockers, usable alone or with other treatments for steady long-term IOP reduction and ocular hypertension management.

Accessing Trusopt eye drops online is simple and safe.

  1. Complete a short consultation and answer a few medical questions about your eye condition.
  2. A qualified prescriber checks if Trusopt is suitable for you.
  3. If approved, your prescription drops are delivered discreetly to your address.
Frequently Asked Questions

Trusopt starts working within a few hours, but the full pressure-lowering effect may take a few weeks. Regular use is important to keep eye pressure stable over time.

Yes, Trusopt is often used alongside other glaucoma treatments. Leave at least 10 minutes between drops so each medicine works properly without washing the other out.

This happens when some of the drop drains into your throat. Pressing the inner corner of your eye after use can reduce this and limit the taste.

If used alone, it's usually three times daily. If combined with other treatments, it's often twice daily. Always follow the exact instructions given with your prescription.

Yes, but remove your lenses before applying the drops. Wait at least 15 minutes before putting them back in to avoid irritation or damage.

Use the drop as soon as you remember, unless it's close to your next dose. Skip the missed one if needed; don't use extra drops to make up for it.

Yes, they are commonly used long-term to control eye pressure. Regular check-ups are important to make sure the drops are working and your vision stays protected.

Yes, temporary blurred vision can happen right after applying the drops. It usually clears quickly, but wait until your vision is clear before driving or using machines.

People with severe kidney problems, kidney stones, or allergies to similar medicines should avoid them. Always check suitability during your consultation before starting treatment.

Yes, Trusopt is prescribed for both conditions. It works by lowering eye pressure, which helps protect the optic nerve and reduce the risk of vision loss.

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Review By

HARMINDER ‘HARMY’ KAUR

Last Updated On : Mar 13 2026

BSc(hons) Pharmacy

GPhC Number: 2061107

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Authored By

GURDEV SEHMI

Last Reviewed On : Mar 23 2026

BSc Pharm, MRPharmS, Independent Prescriber, Superintendent Pharmacist, Clinical Lead

GPhC Number: 2050925