Comprehensive Nursing Pharmacology Q 294

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A 17-year-old client is taking phenytoin (Dilantin) for the treatment of seizures. Phenytoin blood level reveals to be 25 mcg/ml. Which of the following symptoms would be expected as a result of the laboratory result?

  

     A. No symptoms, because the value is within the normal range.

     B. Hyperactivity.

     C. Tremors.

     D. Nystagmus.

    

    

Correct Answer: D. Nystagmus.

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Option D: Phenytoin levels of 20 to 30 mg/L result in nystagmus (Involuntary eye movement).

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Option A: The therapeutic level of phenytoin is 10-20mcg/ml. No symptoms will be noted.

Options B & C: Hyperactivity and tremors would occur in phenytoin levels of more than 30 mcg/mL.

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