What is the therapeutic medication level of phenytoin that indicates it has been achieved in a client?

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The therapeutic medication level of phenytoin is typically established between 10 to 20 mcg/mL, with levels above this range indicating potential toxicity. The choice of 15 mcg/mL falls within the therapeutic window, making it an appropriate target for effective seizure management while minimizing the risk of adverse effects. This level is particularly crucial because maintaining phenytoin within this range is essential for achieving the desired anticonvulsant effect without the complications that can arise from higher concentrations, such as dizziness, drowsiness, or more severe neurological symptoms.

Levels lower than 10 mcg/mL may not provide sufficient seizure control, while levels higher than 20 mcg/mL risk toxicity and adverse effects, emphasizing the importance of careful monitoring of this medication in clinical practice.

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