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Phenylephrine eye drops

  • Phenylephrine eye drops are usually used to dilate (widen) the pupil of the eye before an eye examination.
  • Common side-effects may include stinging and blurred vision. These do not last long.
  • Do not drive for 1-2 hours after using these drops.

About phenylephrine eye drops

Type of medicineSympathomimetic eye preparation
Used forEye examinations
Some inflamed eye conditions
Also calledMinims® Phenylephrine
Available asEye drops and single-dose preservative-free eye drops (also known as unit dose vials)

Phenylephrine eye drops work by dilating (widening) the pupil of the eye.

Before using phenylephrine eye drops

Before using phenylephrine eye drops make sure your doctor or pharmacist knows:

  • If you are pregnant, trying for a baby or breast-feeding.
  • If you suffer from glaucoma (increased pressure in the eyes).
  • If you have heart problems or an irregular heartbeat.
  • If you suffer from high blood pressure.
  • If you have hyperthyroidism (an overactive thyroid gland).
  • If you have diabetes.
  • If you have asthma.
  • If you are taking other medicines, including those available to buy without a prescription, herbal or complementary medicines.
  • If you have ever had an allergic reaction to this or any other medicine.

How to use phenylephrine eye drops

  1. Wash your hands well before use.
  2. Remove the outer cap (or the tip of the vial if you are using unit dose vials).
  3. Tilt the head back and pull the lower lid of the eye out to form a pocket.
  4. Hold the container between the thumb and middle finger of the other hand and turn the container upside down near to the eye. Try not to touch the eye with the nozzle.
  5. Apply enough pressure to the container to release one to two drops.
  6. Close the eye and keep it closed for a minute or two.
  7. Repeat in the other eye if you have been instructed to use phenylephrine in both eyes.
  8. Replace the outer cap on the container. Try not to touch the applicator tip on any surface (including the eye or the fingers). If you are using the single dose vials, throw away the vial after each application.
  9. Wash your hands

Getting the most from your treatment

  • Read the manufacturer's information leaflet before beginning treatment.
  • Do not drive for 1-2 hours after using these drops.
  • You should not wear soft contact lenses while you are being treated with this preparation.
  • If your symptoms do not improve within a few days, or if they become worse, check with your doctor.
  • If you are having any treatment like an operation or dental treatment, tell the person carrying out the treatment which medicines you are taking or using.

Can phenylephrine eye drops cause problems?

Along with their useful effects all medicines can cause unwanted side effects which usually improve as your body adjusts to the new medicine. Speak with your doctor or pharmacist if any of the following side effects continue or become troublesome.

Common side-effects - these affect less than 1 in 10 people who use these dropsWhat can I do if I experience this
Stinging and blurred visionDo not drive or operate hazardous machinery until your vision is clear
Eye pain or dislike of bright lightsThis is usually mild and does not last long

If you experience any other symptoms which you think may be due to this medicine, speak with your doctor or pharmacist.

How to store phenylephrine eye drops

  • Keep all medicines out of the reach and sight of children.
  • Store in a cool, dry place, away from direct heat and light.
  • Eye drops only keep for a short while once opened - the container will say how long the drops can be used for. If you are still using the drops after this time, make sure you obtain a fresh supply. Single or unit dose vials must be thrown away after each use.

Important information about all medicines


  • Never take more than the prescribed dose. If you suspect that you or someone else has swallowed some of this medicine, go to the accident and emergency department of your local hospital at once. Take the container with you, even if it is empty.
  • This medicine is for you. Never give it to other people even if their condition appears to be the same as yours.
  • Never 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.

References

Comprehensive patient resources are available at www.patient.co.uk
© EMIS 2009DocID: 3657DocRef: dils3399Last Reviewed: 26 May 2009Version: 22
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