What it is used for

Open-angle glaucoma
High pressure in the eye (ocular hypertension)

Read our guides:

Glaucoma

Off-label uses

Doctors sometimes prescribe a medicine for a condition it is not officially licensed for. This is called off-label use. It is legal and common when there is good evidence it helps, and your doctor should explain why they are suggesting it.

Bimatoprost is not commonly used off-label.

How it works

Bimatoprost is similar to natural chemicals called prostaglandins. It helps fluid drain out of the eye more easily, which lowers the pressure inside the eye.

Side effects

Like all medicines, Bimatoprost can cause side effects, although not everyone gets them. Many are mild and ease after the first few weeks.

Common side effects

red or itchy eyes
longer
darker eyelashes
darkening of the skin around the eye
a gradual darkening of the coloured part of the eye (iris)

Tell your doctor or pharmacist if these bother you or do not go away.

Serious side effects

These are rare. Call 111 or contact your doctor straight away if you get:

eye pain, swelling or a sudden change in vision

Call 999 if you have signs of a serious allergic reaction, such as swelling of your lips, mouth, throat or tongue, or trouble breathing.

You can report any side effect to the Yellow Card scheme, run by the medicines regulator.

Stopping and withdrawal

Important safety information

Use it once a day, usually in the evening.
Remove contact lenses before using the drops and wait 15 minutes before putting them back in.
Changes to iris colour can be permanent.

Questions about your medicine?

A pharmacist can answer questions about your medicines for free, without an appointment. You can also ask your GP for a medication review. Check if you can get free prescriptions.