Essential of Pediatric Nursing Test Bank Related

Review Essential of Pediatric Nursing Test Bank related questions and content

The client with epilepsy is taking the prescribed dose of phenytoin (Dilantin) to control seizures. Results of a phenytoin blood level study reveal a level of 35 mcg/ml. Which of the following symptoms would be expected as a result of this laboratory result?

  • A. Nystagmus
  • B. No symptoms, because this is normal
  • C. Tachycardia therapeutic level
  • D. Slurred speech
Correct Answer: A

Rationale: A phenytoin blood level of 35 mcg/ml is considered to be above the therapeutic range (usually 10-20 mcg/ml for phenytoin). At this elevated level, the client is at risk for phenytoin toxicity. Symptoms of phenytoin toxicity include nystagmus (rapid, involuntary eye movements), as well as other symptoms such as confusion, slurred speech, ataxia, and tremors. Tachycardia is not typically associated with phenytoin toxicity. Therefore, the expected symptom in this case would be nystagmus.