Abstract
Isolated downbeat nystagmus was observed in 2 patients on multiple anticonvulsant regimens. The nystagmus disappeared when phenytoin dosage was reduced. Electrooculographic analysis revealed impaired downward tracking, supporting the concept of "pursuit" nystagmus.
MeSH terms
-
Adult
-
Anticonvulsants / adverse effects*
-
Carbamazepine / adverse effects
-
Eye Movements
-
Female
-
Humans
-
Nystagmus, Pathologic / chemically induced*
-
Nystagmus, Pathologic / physiopathology
-
Phenytoin / adverse effects
-
Primidone / adverse effects
Substances
-
Anticonvulsants
-
Primidone
-
Carbamazepine
-
Phenytoin