Myoclonic seizure due to cyclopentolate eye drop in a preterm infant

Ayşe Büyükcam1, H Tolga Celik, Ayşe Korkmaz

  • 1Department of Pediatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey. dr.aysebaktir@gmail.com

Insights

Cyclopentolate eye drops can cause rare myoclonic seizures in infants. This case highlights the importance of appropriate dosing for cyclopentolate hydrochloride and phenylephrine hydrochloride, especially in premature infants undergoing retinopathy of prematurity screening.

Area of Science:

  • Ophthalmology
  • Pediatrics
  • Pharmacology

Background:

  • Cyclopentolate is a common ophthalmic medication known for its potent mydriatic and cycloplegic effects.
  • Systemic side effects of cyclopentolate have been documented in pediatric populations.
  • Phenylephrine is often used in combination with cyclopentolate for enhanced mydriasis.

Observation:

  • A three-month-old infant developed a convulsion after receiving cyclopentolate hydrochloride and phenylephrine hydrochloride eye drops.
  • The eye drops were administered prior to ophthalmoscopy for the evaluation of retinopathy of prematurity (ROP).

Findings:

  • This case represents a rare instance of myoclonic seizure, a serious systemic side effect, associated with topical cyclopentolate and phenylephrine use.
  • The infant's convulsion occurred in the context of standard ophthalmic examination procedures.

Implications:

  • Ophthalmologists and pediatricians should be vigilant regarding the potential for uncommon systemic adverse events, such as seizures, with cyclopentolate eye drops.
  • Careful consideration of dosage and patient-specific risk factors is crucial when prescribing these medications, particularly in neonates and infants.
  • Further research into the neurotoxic potential and safe dosing of ophthalmic agents in pediatric populations is warranted.

Related Concept Videos

Antiepileptic Drugs: Potassium Channel Activators01:20

Antiepileptic Drugs: Potassium Channel Activators

Ezocgabine or retigabine, an antiepileptic drug of remarkable efficacy, has revolutionized the management of seizures. It is a potassium channel activator, explicitly targeting the family of Q subtype potassium channels. It enhances the transmembrane potassium currents, regulating neuronal excitability. This action stabilizes the resting membrane potential, a pivotal factor in mitigating the hyperexcitability that characterizes epilepsy.
Ezogabine has gained approval as an adjunctive treatment...
Ophthalmic Drug Delivery Systems01:23

Ophthalmic Drug Delivery Systems

Ophthalmic drug delivery faces major limitations due to poor absorption across the corneal membrane. This process is primarily driven by diffusion and is influenced by two main factors: the physicochemical properties of the drug and tear drainage. Most ophthalmic drugs, such as pilocarpine, epinephrine, atropine, and local anesthetics, are weak bases. They are typically formulated at an acidic pH to enhance chemical stability. However, this leads to high ionization, reducing their ability to...
Direct-Acting Cholinergic Agonists: Therapeutic Uses01:11

Direct-Acting Cholinergic Agonists: Therapeutic Uses

Direct-acting cholinergic agonists have many therapeutic uses in various medical fields. Choline esters, including acetylcholine, have limited clinical utility due to their non-selectivity and short duration of action. Still, acetylcholine and carbachol are applied topically during ophthalmologic surgery to induce miosis. Pilocarpine, a muscarinic and ganglionic stimulator, effectively treats open-angle glaucoma and alleviates xerostomia and dry mouth caused by radiotherapy or Sjögren syndrome.
Seizures l: Introduction01:20

Seizures l: Introduction

Understanding seizures and epilepsy relies on key definitions that help in recognizing, classifying, and managing these disorders. These definitions provide a framework for recognizing, classifying, and managing seizure disorders.DefinitionsA seizure is a sudden, abnormal burst of electrical activity in the brain that can cause changes in awareness, movement, sensation, or behavior, depending on the area involved. Epilepsy is a chronic condition characterized by recurrent, unprovoked seizures,...
Seizures: Classification01:13

Seizures: Classification

Epilepsy is primarily characterized by unpredictable seizures, either provoked by an identifiable factor, such as injury or illness, or unprovoked, occurring spontaneously without apparent cause.
Seizures are typically classified into two main categories: focal and generalized seizures.
Focal Seizures
Focal seizures originate from specific regions of the brain. These seizures are further sub-classified into two types:
Accessory Structures of the Eye01:17

Accessory Structures of the Eye

Optical perception, or vision, is an extraordinary sense dependent on converting light signals received via the ocular organs. These organs, known as eyes, are securely positioned within the bony cavities of the skull, called orbits. The orbits serve a dual purpose: a protective shield for the ocular globes and a stable attachment point for the soft ocular tissues. The eye's external protective mechanisms include the eyelids, which are edged with lashes that act as a barrier against foreign...