Arizona Caregiver Certification – Free Practice Test & Study Guide (2025)

Question: 1 / 400

An individual receiving phenytoin (Dilantin) for a seizure would need monitoring of

Urine output

Respiratory rate

Heart rate

Blood concentration

Monitoring the blood concentration of phenytoin (Dilantin) is essential because this medication has a narrow therapeutic index, meaning the effective dose is very close to the toxic dose. It’s crucial to ensure that the levels remain within a specific range to prevent potential side effects or toxicity while also ensuring that the drug effectively manages seizures. Regular blood tests help in adjusting the dosage if necessary, so the patient maintains optimal control over their condition.

While monitoring urine output, respiratory rate, and heart rate may be relevant in specific clinical situations or with particular patients, they are not as critical as monitoring blood concentration for someone taking phenytoin. This focus on blood levels aligns with standard care practices in pharmacotherapy to ensure safe and effective use of antiepileptic drugs.

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