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Year : 2008  |  Volume : 40  |  Issue : 6  |  Page : 278-280

Ocular adverse effects of Topiramate: Two case reports

1 Department of Pharmacology, Institute of Postgraduate Medical Education and Research, Kolkata, India
2 Department of Neuromedicine (former attachment), Bangur Institute of Neurosciences and Psychiatry, Kolkata, India

Correspondence Address:
Suparna Chatterjee
Department of Pharmacology, Institute of Postgraduate Medical Education and Research, Kolkata
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0253-7613.45156

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Topiramate, an antiepileptic drug is reported to cause various ocular adverse effects like acute onset myopia, glaucoma. Visual field defect is an uncommon, serious treatment emergent adverse effect. We are reporting two cases of suspected topiramate induced visual field defects. Both the cases were on topiramate for more than 6 months as add-on therapy at daily doses ranging from 100-150mg. The presenting complaints were insidious onset visual disturbances. Diagnosis was based of temporal association with drug intake, clinical examination and investigations. Automated perimetry revealed bilateral superior quadrantic and arcuate field defects in the two cases respectively. Marked improvement with drug dechallenge was noted which was also corroborated by perimetry. Using Naranjo's ADR Probability Scale, both cases revealed a "probable" association with topiramate. This report intends to improve awareness amongst clinicians to facilitate early diagnosis and intervention.


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