Mydrilate eye drops contain the active ingredient cyclopentolate, which is a type of medicine called an anticholinergic (or antimuscarinic). It is used to aid eye examinations.
Cyclopentolate blocks muscarinic receptors in the muscles of the eye. These receptors are involved controlling the size of the pupil and the shape of the lens. By blocking these receptors, cyclopentolate causes the pupil to dilate (mydriasis), which it makes it easier to examine structures inside the eyeball, such as the retina, optic disc, macula and fovea. This is called fundoscopy.
Cyclopentolate also temporarily paralyses the muscles that help the eye focus (cycloplegia), which is used to aid tests on vision (cycloplegic refraction), particularly in children.
One drop will be put into the eyes 40 minutes before the eye exam, and if necessary a second drop 15 minutes later.
Cyclopentolate is also used in the treatment of inflammatory eye conditions such as iritis and uveitis. When treating inflammatory eye conditions one or two drops are put into the eye up to four times a day, or as directed by your doctor.
This medicine should not be used if you are allergic to one or any of its ingredients. Please inform your doctor or pharmacist if you have previously experienced such an allergy. If you feel you have experienced an allergic reaction, stop using this medicine and inform your doctor or pharmacist immediately.
Certain medicines should not be used during pregnancy or breastfeeding. However, other medicines may be safely used in pregnancy or breastfeeding providing the benefits to the mother outweigh the risks to the unborn baby. Always inform your doctor if you are pregnant or planning a pregnancy, before using any medicine.
Medicines and their possible side effects can affect individual people in different ways. The following are some of the side effects that are known to be associated with this medicine. Just because a side effect is stated here, it does not mean that all people using this medicine will experience that or any side effect.
The side effects listed above may not include all of the side effects reported by the medicine's manufacturer. For more information about any other possible risks associated with this medicine, please read the information provided with the medicine or consult your doctor or pharmacist.
You should always tell your doctor, optometrist or pharmacist what medicines you are already using, including those bought without a prescription and herbal medicines, before these eye drops are used, so they can make sure that the combination is safe.
Eye drops can be absorbed into the bloodstream from the eye and once in the bloodstream they have the potential to interact with other medicines. You should minimise the absorption of these drops into the bloodstream by pressing on the tear duct (the corner of the eye closest to the nose) for about two minutes after the drops are put in.
Many groups of medicines have anticholinergic effects. If this medicine is used in people taking any of these, there may be an increased likelihood of anticholinergic side effects, such as blurred vision, dry mouth, constipation and difficulty passing urine. Other medicines with anticholinergic effects include the following: