What statement indicates understanding of phenytoin's therapeutic range?

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The statement regarding the therapeutic range of phenytoin being 10-20 mcg/mL is important because phenytoin is a medication frequently used to control seizures in individuals with epilepsy. Understanding its therapeutic range is critical for safe and effective patient care. The range of 10-20 mcg/mL indicates the optimal levels where the drug is effective without causing toxicity. When levels exceed this range, there is a significant risk of adverse effects, including central nervous system issues and possible life-threatening conditions. Monitoring drug levels within this therapeutic window is essential to adjust dosages appropriately and avoid complications that could arise from elevated serum levels. This knowledge reflects a solid understanding of pharmacotherapy principles involving antiepileptic medications like phenytoin.