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Monopost 50 micrograms/ml eye drops, solution in single-dose Container – patient leaflet, side effects, dosage

Last updated: · Text from the MHRA, as of · About this document

Medicine status: Prescription only (POM) Details

Medicine strength:
50 micrograms/ml
Contains active substance:

Patient leaflet - Monopost 50 micrograms/ml eye drops, solution in single-dose Container

1. WHAT MONOPOST IS AND WHAT IT IS USED FOR

MONOPOST belongs to a group of medicines known as prostaglandins. It lowers the pressure within your eye by increasing the natural outflow of fluid from inside the eye into the bloodstream.

MONOPOST is used to treat conditions known as open angle glaucoma and ocular hypertension. Both of these conditions are linked with an increase in the pressure within your eye, eventually affecting your eye sight.

2. WHAT YOU NEED TO KNOW BEFORE YOU USE MONOPOST

Do not use MONOPOST

  • If you are allergic (hypersensitive) to

    latanoprost or any of the other ingredients of this medicine (listed in section 6). Warnings and precautions

Talk to your doctor, or pharmacist or nurse before using MONOPOST if you think any of the following apply to you:

  • If you are about to have or have had eye

    surgery (including cataract surgery).

  • If you suffer from eye problems (such as

    eye pain, irritation or inflammation, blurred vision).

  • If you have severe asthma or your asthma

    is not well controlled.

  • If you wear contact lenses. You can still use

    MONOPOST, but follow the instruction for contact lens wearers in Section 3.

    • If you have suffered or are currently

      suffering from a viral infection of the eye caused by the herpes simplex virus (HSV). Children

MONOPOST has not been investigated in children (below 18 years).

Other medicines and MONOPOST MONOPOST may interact with other medicines. Tell your doctor or pharmacist if you are using, have recently used or might use any other medicines.

Pregnancy and breast-feeding

Do not use MONOPOST when you are pregnant or 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 using this medicine.

Driving and using machines

When you use MONOPOST you might have blurred vision, for a short time. If this happens to you, do not drive or use any tools or machines until your vision becomes clear again.

Important information about some of the ingredients of MONOPOST

MONOPOST contains macrogolglycerol hydroxystearate (derived from castor oil) which may cause skin reactions.

3. HOW TO USE MONOPOST

Usual dose

  • Always use MONOPOST exactly as your

    doctor has told you. Check with your doctor or pharmacist if you are not sure.

  • The usual dose for adults (including the

    elderly) is one drop once a day in the affected eye(s). The best time to do this is in the evening.

  • Do not use MONOPOST more than once

    a day, because the effectiveness of the treatment can be reduced if you administer it more often.

  • Always use MONOPOST exactly as this

    leaflet tells you to or as your doctor has told you, until your doctor tells you to stop. Check with your doctor, or pharmacist or nurse if you are not sure.

Contact lens wearers

If you wear contact lenses, you should remove them before using MONOPOST. After using MONOPOST you should wait 15 minutes before putting your contact lenses back in.

Instructions for use

The drops are supplied in single-dose units. Use the solution from one single dose unit for administration to the affected eye(s) immediately after opening the container. Since sterility cannot be maintained after opening, throw away the container immediately after using the solution. Open a new single-dose unit every time you use

MONOPOST.

These instructions tell you how to use the drops:

  1. 1. Wash your hands and sit or stand comfortably.
  2. 2. Open the sachet. Write down the date of first opening on the sachet.
  3. 3. Break off one single-dose container from the strip.
  4. 4. Twist open the top of the single-dose container as shown. Do not touch the tip after opening the container.
  5. 5. Use your finger to gently pull down the lower eyelid of your affected eye.
  6. 6. Place the tip of the single-dose container close to, but not touching your eye.
  7. 7.

    Squeeze the single-dose container gently so that only one drop goes into your eye,

    then release the lower eyelid.

    1. 8.

      Press a finger against the corner of the affected eye by the nose. Hold for 1 minute whilst keeping the eye closed.

      Monopost

      50 micrograms/ml eye drops, solution in single-dose container

      Latanoprost

  8. 9.

    Repeat in your other eye if your doctor

    has told you to do this. Each single-dose container contains enough solution for both eyes.

  9. 10.

    Throw away the single-dose container

    after use. Do not keep it to use it again. Since sterility cannot be maintained after the individual single-dose container is opened, a new container must be opened prior to each use.

If you use MONOPOST with other eye drops

Wait at least 5 minutes between using MONOPOST and using other eye drops. If you use more MONOPOST than you should

If you put too many drops into your eye, you may have some minor irritation in your eye and your eyes may water and turn red. This should pass, but if you are worried talk to your doctor.

Contact your doctor as soon as possible if you swallow MONOPOST accidentally.

If you forget to use MONOPOST

Carry on with the usual dosage at the usual time. Do not take a double dose to make up for a forgotten dose. If you are unsure about anything talk to your doctor or pharmacist. If you stop using MONOPOST

Talk to your doctor if you want to stop using MONOPOST.

If you have any further questions on the

use of this medicine, ask your doctor, or pharmacist or nurse.

4. POSSIBLE SIDE EFFECTS

Like all medicines, this medicine can cause side effects, although not everybody gets them.

The following are known side effects of using MONOPOST:

Very common: may affect more than 1 in 10 people

  • A gradual change in your eye colour by

    increasing the amount of brown pigment in the coloured part of the eye known as the iris.

    • If you have mixed-colour eyes (blue-brown, grey-brown, yellow-brown or green-brown) you are more likely to see this change than if you have eyes of one colour (blue, grey, green or brown eyes).
    • Any changes in your eye colour may take years to develop although it is normally seen within 8 months of treatment.
    • The colour change may be permanent and may be more noticeable if you use MONOPOST in only one eye.
    • There appears to be no problems associated with the change in eye colour.
    • The eye colour change does not continue after MONOPOST treatment is stopped.
  • Redness of the eye.
  • Eye irritation (a feeling of burning, grittiness,

    itching, stinging or the sensation of a

    foreign body in the eye).

    • A gradual change to eyelashes of the

      treated eye and the fine hairs around the treated eye, seen mostly in people of Japanese origin. These changes involve an increase of the colour (darkening), length, thickness and number of your eye lashes. Common: may affect up to 1 in 10 people

    • Irritation or disruption to the surface of

      the eye, eyelid inflammation (blepharitis), eye pain, sensitivity to light (photophobia), conjunctivitis.

Uncommon: may affect up to 1 in 100 people

  • Eyelid swelling, dryness of the eye,

    inflammation or irritation of the surface of the eye (keratitis), blurred vision, inflammation of the coloured part of the eye (uveitis), swelling of the retina (macular oedema)

  • Skin rash.
  • Chest pain (angina), awareness of heart

    rhythm (palpitations).

  • Asthma, shortness of breath (dyspnoea).
  • Chest pain.
  • Headache, dizziness.
  • Muscle pain, joint pain.
  • Nausea, vomiting.

Rare: may affect up to 1 in 1,000 people

  • Inflammation of the iris (iritis), symptoms

    of swelling or scratching/damage to the surface of the eye, swelling around the eye (periorbital oedema), misdirected eyelashes

    or an extra row of eyelashes, fluid filled area within the coloured part of the eye (iris cyst).

    • Skin reactions on the eyelids, darkening of

      the skin of the eyelids.

    • Worsening of asthma.
    • Severe itching of the skin.
    • Developing a viral infection of the eye

      caused by the herpes simplex virus (HSV). Very rare: may affect up to 1 in

10,000 people

  • Worsening of angina in patients who also

    have heart disease, sunken eye appearance (eye sulcus deepening).

Reporting of side effects

If you get any side effects, talk to your doctor, or pharmacist or nurse. This includes any possible side effects not listed in this leaflet. You can also report side effects directly via the Yellow Card Scheme.

Website:

www.mhra.gov.uk/yellowcard

or search for MHRA Yellow Card in the Google Play or Apple App Store.

By reporting side effects you can help provide more information on the safety of this medicine.

5. HOW TO STORE MONOPOST

Keep this medicine out of the sight and reach of children.

Do not use this medicine after the expiry date

which is stated on the carton, sachet and single-dose container. The expiry date refers to the last day of that month.

Store below 25°C.

After first opening of the sachet: use the single-dose containers within 10 days. After first opening of the single-dose container: use immediately and throw away the single-dose container after use. 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. CONTENTS OF THE PACK AND OTHER INFORMATION

What MONOPOST contains

The active substance is latanoprost. 1 ml eye drops solution contains

50 micrograms of latanoprost.

The other ingredients are: macrogolglycerol hydroxystearate 40, sorbitol, carbomer 974P, macrogol 4000, disodium edetate, sodium hydroxide (for pH-adjustment), water for injections.

What MONOPOST looks like and contents of the pack

This medicine is an eye drops, solution in a single-dose container. The solution looks slightly yellow and cloudy. It contains no preservative.

The single-dose containers are packed in a sachet of 5 or 10 units, each single-dose container holding 0.2 ml of solution. A pack size contains 5 (1 sachet of 5), 10 (2 sachets of 5), 10 (1 sachet of 10), 30 (6 sachets of 5), 30 (3 sachets of 10), 90 (18 sachets of 5) or 90 (9 sachets of 10) single-dose containers.

Not all pack sizes may be available. Marketing Authorisation Holder and Manufacturer

Marketing Authorisation Holder

LABORATOIRES THEA

12 RUE LOUIS BLERIOT

63017 CLERMONT-FERRAND CEDEX 2 FRANCE

Manufacturer

EXCELVISION

27, RUE DE LA LOMBARDIERE

ZI LA LOMBARDIÈRE

07100 ANNONAY

FRANCE

This leaflet was last revised in 05/2025.

If you would like any more information, or would like the leaflet in a different format, please contact Medical Information at THEA Pharmaceuticals Ltd, telephone number 0345 521 1290

About this document

Source: MHRA - Medicines and Healthcare products Regulatory Agency (products.mhra.gov.uk) · Marketing authorisation: PL 20162/0015

Last revision stated in the text: May 2025 · MHRA data as of 13 October 2026

Found a mistake? Tell us on the contact page.

The information on this site does not replace the advice of a doctor or pharmacist.

Facts about Monopost 50 micrograms/ml eye drops, solution in single-dose Container

Prescription needed? Yes, prescription-only medicine (POM)
Active substance Latanoprost
Strength 50 micrograms/ml
Pharmaceutical form Eye drops
How is it taken Ocular
Pack sizes 30 unit dose, 90 unit dose
Is it available? Listed as available (NHS Dictionary of Medicines and Devices – not a record of current supplies)
Drug group (ATC)
  1. S Sensory organ drugs
    1. S01 Ophthalmologicals
      1. S01E Antiglaucoma preparations and miotics
        1. S01EE Prostaglandin analogues, antiglaucoma drugs and miotics
          1. S01EE01 latanoprost
Marketing authorisation PL 20162/0015
Codes GTIN 3662042002052, 3662042002137 · BNF 11060000

Sources: the MHRA product information (products.mhra.gov.uk) and the NHS Dictionary of Medicines and Devices (dm+d), release 10.1.0 of 12 October 2026, NHS Business Services Authority. Contains public sector information licensed under the Open Government Licence v3.0.