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Gabapentin Relieves Vertigo of Periodic Vestibulocerebellar Ataxia: 3 Cases and Possible Mechanism.
OBJECTIVE: The aim of this study was to report relief of optokinetic-triggered vertigo (OKTV) with low-dose gabapentin in three patients with periodic vestibulocerebellar ataxia [episodic ataxia type 4 (EA4); OMIM 606552].
METHODS: Clinical observations and analysis of video-recorded eye movements were used before and after gabapentin.
RESULTS: Gabapentin relieved vertigo of all three treated patients with EA4, particularly during activities that typically would induce vertiginous symptoms. Two patients reported 8-12 hours of sustained relief after the first 100 mg dose. One has benefited from 100-200 mg TID for 7 years. Video analysis of nystagmus revealed improved target tracking on smooth pursuit and a steadier gaze hold.
CONCLUSIONS: Gabapentin effectively relieved the optokinetic-triggered vertigo in our patients with EA4. Mechanisms are postulated in terms of known tight gabapentin binding to the Purkinje cell voltage-gated calcium channel. The observations may offer insight into this rare disease's neuropathology. © 2021 International Parkinson and Movement Disorder Society.
METHODS: Clinical observations and analysis of video-recorded eye movements were used before and after gabapentin.
RESULTS: Gabapentin relieved vertigo of all three treated patients with EA4, particularly during activities that typically would induce vertiginous symptoms. Two patients reported 8-12 hours of sustained relief after the first 100 mg dose. One has benefited from 100-200 mg TID for 7 years. Video analysis of nystagmus revealed improved target tracking on smooth pursuit and a steadier gaze hold.
CONCLUSIONS: Gabapentin effectively relieved the optokinetic-triggered vertigo in our patients with EA4. Mechanisms are postulated in terms of known tight gabapentin binding to the Purkinje cell voltage-gated calcium channel. The observations may offer insight into this rare disease's neuropathology. © 2021 International Parkinson and Movement Disorder Society.
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