Patient leaflet - Trusopt Preservative-free 20 mg/ml eye drops, solution in single-dose Container
1. What Trusopt Preservative-Free is and what it is used for
Trusopt Preservative-Free contains dorzolamide which belongs to a group of medicines called “carbonic anhydrase inhibitors”.
This medicine is prescribed to lower raised pressure in the eye and to treat glaucoma. This medicine can be used alone or in addition to other medicines which lower the pressure in the eye (so-called beta-blockers).
2. What you need to know before you use Trusopt Preservative-Free
Do not use Trusopt Preservative-Free
- if you are allergic to dorzolamide hydrochloride or any of the other ingredients of this medicine (listed in section 6).
- if you have severe kidney impairment or problems, or a prior history of kidney stones.
If you are not sure whether you should use this medicine, contact your doctor or pharmacist.
Warnings and precautions
Talk to your doctor or pharmacist before using TRUSOPT Preservative-Free.
Tell your doctor or pharmacist about any medical problems you have now or have had in the past, including eye problems and eye surgeries, and about any allergies to any medications.
If you develop any eye irritation or any new eye problems such as redness of the eye or swelling of the eyelids, contact your doctor immediately.
If you suspect that TRUSOPT Preservative-Free is causing an allergic reaction (for example, skin rash, severe skin reaction, or itching), stop using this medicine and contact your doctor immediately.
If you wear contact lenses, you should consult your doctor before using TRUSOPT Preservative-Free.
Use in children
Trusopt (preserved formulation) has been studied in infants and children less than 6 years of age who have raised pressure in the eye(s) or have been diagnosed with glaucoma. For more information talk to your doctor.
Use in elderly
In studies with Trusopt (preserved formulation), the effects of this medicine were similar in both elderly and younger patients.
Use in patients with liver impairment
Tell your doctor about any liver problems you now have or have suffered from in the past.
Other medicines and Trusopt Preservative-Free
Tell your doctor or pharmacist if you are using, have recently used or might use any other medicines (including eye drops). This is particularly important if you are taking another carbonic anhydrase inhibitor such as acetazolamide, or a sulpha drug.
Pregnancy and breast-feeding
If you are pregnant or breast-feeding, think you may be pregnant or are planning to have a baby, ask your doctor or pharmacist for advice before taking any medicine.
Pregnancy
You should not use this medicine during pregnancy. Tell your doctor if you are pregnant or intend to become pregnant.
Breast-feeding
You should not use this medicine during breast-feeding. Tell your doctor if you are breast-feeding or intend to breastfeed.
Driving and using machines
No studies on the effects on the ability to drive or use machines have been performed. There are side effects associated with Trusopt Preservative-Free, such as dizziness and blurred vision, which may affect your ability to drive and/or operate machinery. Do not drive or operate machinery until you feel well or your vision is clear.
3. How to use Trusopt Preservative-Free
Always use this medicine exactly as your doctor has told you. Check with your doctor or pharmacist if you are not sure.
The appropriate dosage and duration of treatment will be established by your doctor.
When this medicine is used alone, the recommended dose is one drop in the affected eye(s) in the morning, in the afternoon and in the evening.
If your doctor has recommended you use this medicine with a beta-blocker eye drop to lower eye pressure, then the recommended dose is one drop of Trusopt Preservative-Free in the affected eye(s) in the morning and in the evening.
If you are using Trusopt Preservative-Free with another eye drop, the drops should be instilled at least 10 minutes apart.
Do not change the dose of the drug without consulting your doctor.
Do not allow the tip of the single-dose container to touch the eye or areas around the eye. It may become contaminated with bacteria that can cause eye infections leading to serious damage of the eye, even loss of vision. To avoid possible contamination of the single-dose container, wash your hands before using this medicine and keep the tip of the single-dose container away from contact with any surface.
Instructions for use:
The solution from one individual single-dose container of TRUSOPT Preservative-Free is to be used immediately after opening for administration to the affected eye(s). Since sterility cannot be maintained after the individual single-dose container is opened, a new container must be opened prior to each use and must be discarded immediately after administration. Each single-dose container contains enough solution for both eyes.
Every time you use TRUSOPT Preservative-Free
- 1. Wash your hands.
- 2. Take the strip of containers from the sachet.
- 3. Detach one single-dose container from the strip.
- 4. Put the remaining strip back in the sachet and fold the edge to close the sachet.
- 5. To open the container, twist off the tab. (Picture A).
- 6. Hold the container between your thumb and index finger. Note that the tip of the container must not show more than 5 mm above the edge of your index finger. (Picture B).
- 7. Tilt your head backwards or lie down. Place your hand on your forehead. Your index finger should be aligned with your eyebrow or resting on the bridge of the nose. Look up. Pull the lower eyelid downwards with the other hand. Do not allow any part of the container to touch your eye or any area around your eye. Gently squeeze the container to let one drop fall into the space between the lid and the eye. (Picture C). Do not blink while applying the drop to your eye. Each single-dose container contains enough solution for both eyes.
- 8. Close your eye and press the inner corner of the eye with your finger for about two minutes. This helps to stop the medicine from getting into the rest of the body. (Picture D).
- 9. Wipe off any excess solution from the skin around the eye
- 10. Store the remaining containers in the foil sachet; the remaining containers must be used within 15 days after opening of the sachet. If there are any containers left 15 days after opening the sachet they should be safely thrown away and a fresh sachet opened. It is important to continue to use the eye drops as prescribed by your doctor.
If you use more Trusopt Preservative-Free than you should
If you put too many drops in your eye or swallow any of the contents of the container, you should contact your doctor immediately.
If you forget to use Trusopt Preservative-Free
It is important to take this medicine as prescribed by your doctor. If you miss a dose, take it as soon as possible. However, if it is almost time for the next dose, skip the missed dose and go back to your regular dosing schedule.
Do not take a double dose to make up for the forgotten dose.
If you stop using TRUSOPT Preservative-Free
If you want to stop using this medicine talk to your doctor first. If you have any further questions on the use of this product, ask your doctor or pharmacist.
4. Possible side effects
Like all medicines, this medicine can cause side effects, although not everybody gets them.
If you develop allergic reactions including hives, swelling of the face, lips, tongue, and/or throat which may cause difficulty in breathing or swallowing, you should stop using this medicine and seek immediate medical advice.
The following side effects have been reported with TRUSOPT either during clinical trials or during post-marketing experience:
Very common side effects: (affects more than 1 user in 10)
Burning and stinging of the eyes.
Common side effects: (affects 1 to 10 users in 100)
Disease of the cornea with sore eye and blurred vision (superficial punctuate keratitis), discharge with itching of the eyes (conjunctivitis), irritation/inflammation of the eyelid, blurred vision, headache, nausea, bitter taste, and fatigue.
Uncommon side effects: (affects 1 to 10 users in 1,000)
Inflammation of the iris.
Rare side effects: (affects 1 to 10 users in 10,000)
Tingling or numbness of the hands or feet, temporary shortsightedness which may resolve when treatment is stopped, development of fluid under the retina (choroidal detachment, following filtration surgery), eye pain, eyelid crusting, low pressure in the eye, swelling of the cornea (with symptoms of visual disturbances), eye irritation including redness, kidney stones, dizziness, nose bleed, throat irritation, dry mouth, localized skin rash (contact dermatitis), severe skin reactions, allergic type reactions such as rash, hives, itching, in rare cases possible swelling of the lips, eyes and mouth, shortness of breath, and more rarely wheezing.
Not known: (frequency cannot be estimated from the available data)
Shortness of breath, foreign body sensation in eye (feeling that there is something in your eye), forceful heartbeat that may be rapid or irregular (palpitations), increased heart rate and increased blood pressure.
Reporting of side effects
If you get any side effects, talk to your doctor, pharmacist or nurse. This includes any possible side effects not listed in this leaflet. You can also report side effects directly (see details below). By reporting side effects you can help provide more information on the safety of this medicine.
United Kingdom: Yellow Card Scheme. Website: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store
Ireland: HPRA Pharmacovigilance, website: www.hpra.ie.
5. How to store Trusopt Preservative-Free
Keep out of the sight and reach of children.
Do not use the unopened sachets of this medicine after the expiry date which is stated on the outer carton, foil package and each single-dose container. The expiry date refers to the last day of that month.
Do not store above 30°C. Do not freeze.
Store in the foil sachet in order to protect from light.
You can use TRUSOPT Preservative-Free 15 days after first opening the sachet.
Discard any unused single-dose containers after that time.
Discard the opened single-dose container with any remaining solution immediately after first use.
If your medicine show signs of deterioration or discolouration seek the advice of your pharmacist who will tell you what to do.
Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how to throw away medicines you no longer use. These measures will help protect the environment.
6. Content of the pack and other information
What Trusopt Preservative-Free contains
The active substance is dorzolamide.
Each ml contains 22.26 mg of dorzolamide hydrochloride equivalent to 20 mg of dorzolamide.
The other ingredients are hydroxyethyl cellulose, mannitol, sodium citrate, sodium hydroxide and water for injections.
What Trusopt Preservative-Free look like and the contents of the pack
Trusopt Preservative-Free is a clear, colourless to nearly colourless slightly viscous solution. Low density polyethylene single-dose containers containing 0.2 ml of solution are packed in aluminium sachets.
Available in 6 Aluminum sachets, 60 x 0.2 ml (6 sachets with 10 single-dose containers).
Manufactured by Santen Oy, Kelloportinkatu 1, 33100 Tampere, Finland.
Procured from within the EU and repackaged by Product Licence Holder Uni Health Distribution Limited, Unit G4 Riverside Industrial Estate, Riverside Way, Dartford, Kent, DA1 5BS.
PL 45396/0383 POM
Leaflet date: 18 November 2025 Ref: Truso/UT1
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Trusopt is a registered trademark of Santen Pharmaceutical Co., Ltd.