Which condition would indicate to the nurse that a patient has phenytoin (Dilantin) toxicity?
a. Oculogyric crisis
b. Nystagmus
c. Strabismus
d. Amblyopia
ANS: B
Nystagmus (involuntary rhythmic, uncontrollable movements of one or both eyes) may be a sign of phenytoin toxicity. Oculogyric crisis is an adverse effect of some antipsychotic medications. Strabismus is a visual disorder in which the eyes are misaligned and point in different directions. Amblyopia is a loss of visual acuity in the nondominant eye caused by lack of use of the eye in early childhood.
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