一位有癲癇史的病患處方 Phenytoin。優先的護理評估為何？

Phenytoin 是一種治療窗窄的藥物，療效與毒性受血液藥物濃度影響極大。優先評估血中濃度能確保其在治療範圍內，避免癲癇再次發作或藥物中毒。A 為常見副作用，重要但非急性安全問題。D 與 A 較少與 Phenytoin 直接相關。

Phenytoin is a drug with a narrow therapeutic window, and its efficacy and toxicity are greatly influenced by the serum drug concentration. Priority assessment of the serum level ensures that the drug remains within the therapeutic range, preventing both recurrence of seizures and drug toxicity. Option C is a common adverse effect — important but not an acute safety concern. Options D and A are less directly related to phenytoin.

美台對 Phenytoin 的血藥濃度監測皆極為嚴謹，確保藥效穩定。