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Published on: August 2, 2024
[Neuro-ophthalmic adverse effects of metronidazole treatment in children: Two case studies]
R Bouraoui1, R Limaiem1, M Bouladi1
1Service d'ophtalmologie B, institut Hédi-Rais, boulevard 9-avril, 1006 Tunis, Tunisie.
Insights
Metronidazole can cause rare but severe neuro-ophthalmological side effects, including vision loss and diplopia, in children. Symptoms are reversible upon treatment discontinuation, necessitating careful monitoring.
Area of Science:
- Ophthalmology
- Neurology
- Pediatrics
Background:
- Metronidazole is a common antibiotic used to treat infections like amoebic dysentery.
- Neuro-ophthalmological complications associated with metronidazole are rare but potentially serious.
Observation:
- Two children developed sudden bilateral vision loss, diplopia, and headache after metronidazole treatment for amoebic dysentery.
- Ophthalmic examinations revealed reduced visual acuity, altered pupillary reflexes, and optic neuropathy, with normal imaging.
- Symptoms significantly improved and resolved after discontinuing metronidazole.
Findings:
- Metronidazole administration was linked to reversible neuro-ophthalmological adverse effects in pediatric patients.
- The clinical presentation included optic neuropathy and extraocular muscle dysfunction.
Implications:
- Healthcare providers should consider metronidazole's potential for neuro-ophthalmological toxicity in children.
- Close monitoring for visual disturbances is crucial during and after metronidazole therapy in pediatric cases.
Purpose:
To report the onset of neuro-ophthalmological adverse effects in two children treated with metronidazole for amoebic dysentery.
Observations:
A 6-year-old child and his 8-year-old sister presented with sudden bilateral vision loss and diplopia associated with intense headache and vomiting. The medical history revealed amoebic dysentery 3 weeks before treated orally with metronidazole for 2 weeks. The ophthalmic examination was similar in the two children and revealed visual acuity of 3/10 bilaterally, binocular diplopia, normal oculomotor function, quiet anterior segment, altered afferent pupil light reflex associated with normal fundus examination, and most particularly absence of optic disc edema. The kinetic visual field showed restriction of isopters and blind spot enlargement and the Lancaster test showed discrete paresis of the lateral rectus muscle of the left eye. Orbitocranial computed tomography and magnetic resonance imaging were normal and visual evoked potential results were compatible with optic neuropathy. Clinical progression consisted in spontaneous resolution of general symptoms, total regression of diplopia, improvement of visual acuity, and normalization of visual evoked potentials after treatment interruption. Regression of symptomatology after interruption of the treatment allowed us to retain the toxic origin.
Conclusion:
Metronidazole may have neuro-ophthalmological side effects. These complications are rare but can be severe and are reversible after treatment interruption. Regular follow-up is necessary in children receiving this treatment.
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