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Cosopt/Dorzolamide+Timolol

Cosopt is a beta-blocker eye drop medication that contains two different main actives medicines: dorzolamide and timolol. Dorzolamide belongs to a group of medicines called carbonic anhydrase inhibitors. Timolol belongs to a group of medicines called beta-blockers. These drugs lower intraocular pressure in different ways. Cosopt is prescribed to reduce elevated eye pressure in the treatment of glaucoma when the use of beta-blocker eye drops as monotherapy is not appropriate.

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Cosopt/Dorzolamide+Timolol
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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 £37.00
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Pack Price (£)
- - 5ml x 1 Pack 37.00
- - 5ml x 2 Packs 75.00
- - 5ml x 3 Packs 99.00

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Cosopt Eye Drops for Glaucoma Treatment and Eye Pressure Control

When eye pressure stays high despite using a single treatment, switching to a combination option often gives better results. That's where Cosopt eye drops come in, offering a more complete approach to managing glaucoma.

Cosopt eye drops combine dorzolamide and timolol in one formula to deliver effective, long-lasting eye pressure management. This dual approach targets the problem from two angles, making it a widely used option for people who need stronger glaucoma therapy.

What Are Cosopt Eye Drops Used For?

Cosopt eye drops are prescribed to reduce eye pressure in people with glaucoma or ocular hypertension when single treatments are not enough. Raised pressure inside the eye can damage the optic nerve over time, leading to vision problems if not controlled.

These prescription glaucoma drops are commonly used for open-angle glaucoma, ocular hypertension control, and patients needing stronger IOP lowering drops. They are often recommended when beta-blocker drops alone do not provide enough pressure reduction.

How Cosopt Eye Drops Work

Cosopt glaucoma treatment works by combining two medicines that lower eye pressure in different ways. The formula includes dorzolamide, a carbonic anhydrase inhibitor, and timolol, a beta-blocker.

This carbonic anhydrase inhibitor combo works by reducing fluid production inside the eye and lowering the pressure that builds up over time. Together, they provide reliable eye pressure management and improved results compared to single treatments.

How to Use Cosopt Eye Drops

Cosopt eye drops are usually applied twice daily, morning and evening.

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

Leave at least 10 minutes between different eye drops. Do not touch the dropper tip to your eye or skin. Remove contact lenses before use and wait 15 minutes before reinserting. Use consistently for effective eye pressure management. Do not stop using the drops suddenly, and attend regular eye pressure checks.

Your prescriber will explain everything during your consultation at Pharmacy Planet.

Who Can Use Cosopt Eye Drops?

Cosopt eye drops are suitable for adults who need combination treatment for glaucoma or ocular hypertension. They are typically prescribed for adults whose eye pressure is not controlled with one medicine, patients switching to glaucoma dual medication, and individuals needing long-term glaucoma therapy.

This medication may not be suitable if you are allergic to dorzolamide, timolol or similar medicines, have asthma or severe breathing problems, have certain heart conditions such as slow heart rate or heart failure, or have severe kidney problems or a history of kidney stones. Caution is needed if you have diabetes, thyroid disorders, circulation problems, or liver conditions.

Possible Side Effects of Cosopt Eye Drops

Like all glaucoma therapies, Cosopt may cause side effects in some people.

Common Side Effects:

  • Burning or stinging sensation in the eye
  • Redness or irritation
  • Blurred vision
  • Unusual taste in the mouth
  • Watery or dry eyes

Serious Side Effects — Seek medical attention if you notice:

  • Breathing difficulties
  • Irregular or slow heartbeat
  • Severe dizziness or fainting
  • Signs of allergic reaction such as swelling or rash

Cosopt eye drops may interact with blood pressure or heart medications, beta-blockers or calcium channel blockers, medicines for diabetes, antidepressants such as fluoxetine or paroxetine, and other glaucoma treatments. Always share your full medication list with your prescriber during your consultation.

Why Do People Choose Cosopt Eye Drops?

Cosopt eye drops are chosen for their effective combination approach to lowering eye pressure. People often prefer this treatment because it combines two active ingredients in one bottle, provides strong IOP lowering drops action, reduces the need for multiple medications, is widely prescribed as a trusted glaucoma therapy, and supports consistent ocular hypertension control. For many patients, Cosopt glaucoma treatment offers a more effective and convenient way to manage eye pressure.

How Does the Ordering Process Work at Pharmacy Planet?

Getting Cosopt eye drops online from Pharmacy Planet is simple and clinically guided.

  1. Complete a short consultation and provide details about your glaucoma or ocular hypertension.
  2. A UK-registered prescriber checks if the treatment is suitable.
  3. If approved, your prescription glaucoma drops are delivered safely to your home.
Cosopt Eye Drops

Cosopt combines dorzolamide (carbonic anhydrase inhibitor) and timolol (beta-blocker) for effective dual-action eye pressure management — a widely used option for people needing stronger glaucoma therapy.

Used for open-angle glaucoma, ocular hypertension, and patients needing stronger IOP lowering when beta-blocker drops alone are insufficient.

Dorzolamide (carbonic anhydrase inhibitor) and timolol (beta-blocker) reduce fluid production inside the eye and lower pressure build-up through two complementary mechanisms.

Twice daily, morning and evening. 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 uncontrolled eye pressure on single therapy, those switching to combination glaucoma treatment, or needing long-term dual medication.

Not suitable for allergy to dorzolamide/timolol, asthma/severe breathing problems, certain heart conditions, or severe kidney problems/kidney stone history. Caution for diabetes, thyroid disorders, circulation problems, or liver conditions.

Common: Burning/stinging in eye, redness/irritation, blurred vision, unusual taste in mouth, watery or dry eyes

Serious: Seek medical attention for breathing difficulties, irregular/slow heartbeat, severe dizziness/fainting, or allergic reactions (swelling/rash)

Two active ingredients in one bottle providing strong IOP reduction, reducing the need for multiple medications, widely trusted for consistent long-term ocular hypertension control.

Getting Cosopt eye drops online from Pharmacy Planet is simple and clinically guided.

  1. Complete a short consultation and provide details about your glaucoma or ocular hypertension.
  2. A UK-registered prescriber checks if the treatment is suitable.
  3. If approved, your prescription glaucoma drops are delivered safely to your home.
Frequently Asked Questions

Cosopt is usually prescribed when one eye drop alone does not lower eye pressure enough. It combines two medicines for stronger and more reliable control.

Cosopt starts working within a few hours, but the full pressure-lowering effect builds over several days with regular twice-daily use.

Yes, but only if needed. If used with other eye drops, leave at least 10 minutes between them to make sure each works properly.

This happens when a small amount of the drops drains into the throat. Pressing the corner of your eye after use can reduce this.

Yes, because they contain a beta-blocker, they may slow heart rate or affect breathing in some people, especially those with existing conditions.

Use the missed dose as soon as you remember, unless it is close to your next dose. Do not use two doses at once.

Remove your contact lenses before using the drops. Wait at least 15 minutes before putting them back in to avoid irritation.

Cosopt combines two medicines in one bottle, making treatment simpler. It also ensures both ingredients work together at the same time for better pressure control.

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Review By

GURDEV SEHMI

Last Updated On : Mar 13 2026

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

GPhC Number: 2050925

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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