Cyclopentolate
Cyclopentolate (often branded as Cyclogyl) is used to dilate the pupil and temporarily relax the eye muscles. This medication allows for clear visualization of the back of the eye during specialized screenings and diagnostic assessments. We currently list 1 product for this ingredient, providing sterile formulations for ophthalmic use.
Key points
- An anticholinergic that blocks acetylcholine signals in the iris and ciliary muscle to widen the pupil and stop the lens from focusing.
- Its dual effect of pupil dilation and accommodation paralysis lets an eye specialist view internal structures without constant muscle movement disrupting the image.
- Available as a sterile ophthalmic solution, marketed as Minims Cyclopentolate and Cyclogyl in single-dose and multi-use presentations.
What is Cyclopentolate?
Cyclopentolate is an anticholinergic agent. It works by blocking specific nerve impulses to the eye’s ciliary muscle and iris sphincter. This action is temporary and is utilised widely within the scope of Eye Care to facilitate procedures that require a clear view of the interior structures of the eye.
What Cyclopentolate is used for
This medication is applied during full eye exams to induce Mydriasis, which is the widening of the pupil. It also produces Cycloplegia, the temporary paralysis of the eye’s accommodation muscle. By preventing the lens from changing shape to focus, the eye remains at rest, allowing an ophthalmologist or optometrist to examine the retina and optic nerve without interference from constant muscle movement.
How does Cyclopentolate work?
Cyclopentolate acts on the neurotransmitter acetylcholine to interrupt chemical signals in the eyelid and iris. Because acetylcholine is responsible for constriction, inhibiting it causes the sphincter muscle of the iris to relax, widening the pupil. This effect ensures that the eye remains still during measurement or diagnostic imaging, which is critical for accurate clinical results.
Cyclopentolate brands and forms
Cyclopentolate is distinct in its application, primarily available as a liquid solution. Brands such as Minims Cyclopentolate and Cyclogyl offer sterile, ophthalmic-grade preparations. Patients may find these available in single-dose units or multi-use bottles depending on the manufacturer and the specific requirement for preservation-free application.
Further reading
What is cyclopentolate used for?
Cyclopentolate is used during full eye exams to widen the pupil, which is called mydriasis. It also causes cycloplegia, a temporary paralysis of the eye's accommodation muscle, so the eye stays at rest for examination of the retina and optic nerve.
How does cyclopentolate affect the eye?
Cyclopentolate is an anticholinergic that blocks acetylcholine signals in the iris and ciliary muscle. This causes the pupil to dilate and the ciliary muscle to relax, which helps keep the eye still during diagnostic imaging.
How long do the effects of cyclopentolate last?
The effects of cyclopentolate usually last 3 to 6 hours.
How long does cyclopentolate take to work?
Cyclopentolate usually starts to work within 15 to 30 minutes.
What are the side effects of cyclopentolate?
Common side effects include a stinging sensation and redness. Blurred vision, photophobia and increased intraocular pressure are also possible. Anaphylaxis is a serious side effect that requires immediate medical attention, and you should speak to a doctor or pharmacist if you notice any side effects.
Who should not use cyclopentolate?
Cyclopentolate should not be used by people with untreated glaucoma or by anyone with a hypersensitivity to cyclopentolate. If you are unsure whether it is suitable for you, speak to a doctor or pharmacist.
What cyclopentolate products are available?
Products containing cyclopentolate include Cyclogyl. Compare forms, strengths and packs in the listings above.
What are other names for cyclopentolate?
Besides the products listed here, cyclopentolate is sold under brand names such as Minims Cyclopentolate. Names differ from country to country, so the active ingredient is the surest way to compare.
Can I buy cyclopentolate over the counter in Thailand?
Yes. In Thailand cyclopentolate is sold by pharmacists without a prescription, and Yasabai does not ask for one either. We are an online store, not a dispensing pharmacy; we arrange your order and delivery on your behalf.
Ordering without a prescription →Do you deliver cyclopentolate to Thailand?
Yes. Our pharmacy partners ship from India to Thailand and across Asia in discreet packaging. Standard Airmail takes up to 3 weeks; Express Tracked Courier takes up to 1 week.
How ordering works →