Which statement most accurately describes a symptom not expected in phenytoin overdose?

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Study for the Foundation Year Pharmacy – Clinical Practice Test. Prepare with detailed questions, step-by-step explanations, and test format insights. Enhance your readiness and confidence!

Multiple Choice

Which statement most accurately describes a symptom not expected in phenytoin overdose?

Explanation:
Phenytoin overdose most clearly shows neurologic toxicity due to central nervous system depression and cerebellar/vestibular involvement. Drowsiness reflects generalized CNS depression, while nystagmus indicates disturbance of ocular motor control from brainstem/cerebellar effects. Ataxia arises from impaired cerebellar function, which is a common sign as the drug toxicity progresses. Hypoglycaemia, on the other hand, is a metabolic issue related to glucose regulation and not a typical consequence of phenytoin toxicity. Therefore, low blood glucose is not expected with phenytoin overdose, making it the best description of a symptom not typically seen in this context.

Phenytoin overdose most clearly shows neurologic toxicity due to central nervous system depression and cerebellar/vestibular involvement. Drowsiness reflects generalized CNS depression, while nystagmus indicates disturbance of ocular motor control from brainstem/cerebellar effects. Ataxia arises from impaired cerebellar function, which is a common sign as the drug toxicity progresses. Hypoglycaemia, on the other hand, is a metabolic issue related to glucose regulation and not a typical consequence of phenytoin toxicity. Therefore, low blood glucose is not expected with phenytoin overdose, making it the best description of a symptom not typically seen in this context.

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