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Homatropine eye drops

Editor’s note

Michael Stewart 09/05/2018: There are currently no licensed eye drop products containing homatropine available in the UK. Homatropine eye drops may still be available in other countries. This Medicine Leaflet is based on medical information available in the UK at the time of writing and is left here for reference purposes only. Please also refer to the manufacturer's information supplied with your medicine.

Homatropine eye drops allow your doctor to examine your eye more easily.

The drops can cause blurred vision which may last for several hours. Do not drive and do not use tools or machines until your vision is clear again.

At a glance

  • Homatropine eye drops are used to make your pupil larger and relax eye muscles.

  • This helps with eye examinations or to treat painful inflammation inside the eye.

  • Ensure your doctor knows if you have glaucoma or wear contact lenses before use.

  • Homatropine causes blurred vision, so do not drive until your vision is clear.

  • Throw away the bottle after use as there is no preservative, to prevent eye infections.

Continue reading below

About homatropine eye drops

Type of medicine

An antimuscarinic

Used for

To make the pupil of your eye larger and relax the muscles in your eye

Available as

Eye drops (discontinued UK)

Homatropine makes the pupil of your eye larger and relaxes the muscles in your eye. These things make it easier for your eye to be examined and your vision tested.

Homatropine drops can also be prescribed during the treatment of a condition called anterior uveitis. This is a painful eye condition caused by inflammation within the eye. By making your pupil larger and relaxing the muscles in your eye, it reduces pain and allows the inflamed part of your eye to rest and recover.

To make sure this is the right treatment for you, before you use the drops it is important that your doctor knows:

  • If you have ever had an allergic reaction to any eye drops.

  • If you normally wear contact lenses.

  • If you have been told you have a higher than normal pressure in your eye, or if you have glaucoma.

  • If you are taking or using any other medicines. This includes any medicines you are taking which are available to buy without a prescription, such as herbal and complementary medicines.

  • If you are pregnant or breastfeeding.

Continue reading below

Homatropine eye drops will generally be administered for you, but if you are asked to put the drops in yourself, then:

  1. Wash your hands well before you use the drops.

  2. Remove the cap.

  3. Tilt your head back a little and pull the lower lid of your eye out to form a pocket.

  4. Hold the bottle upside down near to your eye. Try not to touch your eye as you do this.

  5. Apply enough pressure to the dropper to release one drop into your eye. Only use a second drop if the first drop missed going into your eye.

  6. Close your eye for a minute or two, and press gently on the side of your nose where the corner of your eye meets your nose. This helps to stop the drop from draining away and keeps it in your eye.

  7. Repeat the process in your other eye if you have been told to use the drops in both eyes.

  • Take care not to touch your eye, fingers or any other surface with the dropper of the bottle. This could infect the liquid left in the bottle.

  • Homatropine will cause blurred vision which may last for some time. Make sure you can see clearly again before you drive and before you use tools or machines.

  • If you are using any other eye drops or ointments, leave about ten minutes between applying each one. This is to prevent more liquid going into your eye than it can handle. Otherwise the drops will overflow from your eye and may not have the intended effect.

  • If you normally wear contact lenses, do not wear them again until your doctor advises you do so.

Continue reading below

Along with their useful effects, eye drops can cause unwanted side-effects although not everyone experiences them. The table below contains the most common ones associated with homatropine eye drops. Unwanted effects often improve as your body adjusts to a new medicine, but speak with your doctor or pharmacist if any of the following continue or become troublesome.

Homatropine side-effects

What can I do if I experience this?

Eye irritation such as mild stinging

This should soon pass

Large pupil, blurred vision, difficulty with focusing

These may last for several hours. Do not drive and do not operate machinery until your vision is clear again

Rare side-effects: dry mouth, flushing, dry skin, constipation, difficulties passing urine, and a fast heartbeat

These should soon pass, but if you become concerned about any, speak with your doctor

If you experience any other symptoms which you think may be due to the eye drops, speak with your doctor or pharmacist for further advice.

  • Keep all medicines out of the reach and sight of children.

  • Store in a cool, dry place, away from direct heat and light.

  • There is no preservative in homatropine eye drops, so throw away the bottle after use. Never keep opened bottles of eye drops to use later. This will help to prevent the risk of eye infections.

Important information about all medicines

Never take more than the prescribed dose. If you suspect that you or someone else might have taken an overdose of this medicine, go to the accident and emergency department of your local hospital. Take the container with you, even if it is empty.

This medicine is for you. Do not give it to other people even if their condition appears to be the same as yours.

If you buy any medicines, check with a pharmacist that they are suitable to take with your other medicines.

Do not keep out-of-date or unwanted medicines. Take them to your local pharmacy which will dispose of them for you.

If you have any questions about this medicine ask your pharmacist.

Report side effects to a medicine or vaccine

If you experience side effects, you can report them online through the Yellow Card website.

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Unsure about mixing medicines?

Check for possible interactions between medicines, supplements and foods before taking them together.

Frequently asked questions

What is the primary use of homatropine eye drops during an eye examination?

Homatropine eye drops are used to make the pupil of your eye larger and to relax the muscles inside your eye. This process makes it easier for an ophthalmologist to examine your eye thoroughly and test your vision accurately.

How do homatropine eye drops help people with anterior uveitis?

For those with anterior uveitis, homatropine eye drops help by enlarging the pupil and relaxing the eye muscles. This action reduces pain and allows the inflamed parts of the eye to rest and begin to heal.

Are there any specific situations where homatropine eye drops should not be used?

Yes, homatropine eye drops should be used with caution or avoided if you have a history of allergic reactions to other eye drops, or if you have a higher than normal pressure in your eye or glaucoma. It’s important to inform your doctor about these conditions.

Can homatropine eye drops be used while pregnant or breastfeeding?

If you are pregnant or breastfeeding, you should inform your doctor before using homatropine eye drops. Your doctor will need to consider whether it is the right treatment for you in these circumstances.

Why is it important to press gently on the side of my nose after applying the drops?

After applying the drops, closing your eye for a minute or two and pressing gently on the side of your nose (where the corner of your eye meets your nose) helps to prevent the drop from draining away. This ensures the medication stays in your eye to have its intended effect.

What should I do if I am prescribed homatropine eye drops and also use other eye medications?

If you are using other eye drops or ointments, you should wait approximately ten minutes between applying each one. This prevents too much liquid from entering your eye, which could cause the drops to overflow and reduce their effectiveness.

Why can't I keep opened bottles of homatropine eye drops for later use?

Homatropine eye drops do not contain a preservative. To prevent the risk of eye infections, the bottle should be discarded immediately after use and never stored for future application.

Further reading and references

Continue reading below

About the authorView full bio

Author image

Michael Stewart, MRPharmS

Medicine Leaflet Review Manager – Contractor, Pharmacist

BPharm (Hons), MRPharmS

Michael is a community pharmacist practicing in the Midlands and South Yorkshire with more than 20 years’ experience advising on medicines and medical conditions. He has a strong background in healthcare training, having produced and delivered training courses for pharmacy teams and staff of residential care settings, including nurses. He has also contributed to pharmacy advisory boards for the management of low acuity conditions in the community.

About the reviewer

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Sid Dajani

Sultan Dajani qualified at the London School of Pharmacy in 1994 and became the youngest elected member of the Royal Pharmaceutical Society council since its founding in 1842.

Article history

The information on this page is written and peer reviewed by qualified clinicians.

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