Question

A client with epilepsy who has been seizure free and prescribed phenytoin​ (Dilantin) asks the nurse why he or she needs to still have blood testing. Which response should the nurse provide the​ client?

a. "Phenytoin (Dilantin) can deplete your system of​ potassium."
b. "Phenytoin (Dilantin) has a very narrow range between a therapeutic dose and a toxic​ dose."
c. "Phenytoin (Dilantin) can cause​ Stevens-Johnson syndrome, which can be detected through blood​ testing."
d. "Phenytoin (Dilantin) can cause​ blood-thinning in some​ patients."

Answer 1

Phenytoin (Dilantin) requires ongoing blood testing due to its narrow therapeutic range, ensuring medication levels are safe and effective to control seizures without causing toxicity.

Step-by-step explanation:

The client with epilepsy who is prescribed phenytoin (Dilantin) needs to continue having blood testing to monitor the drug levels. This is because phenytoin has a very narrow therapeutic range. The correct response is: "Phenytoin (Dilantin) has a very narrow range between a therapeutic dose and a toxic dose." This means that even small variations in the drug concentration can lead to subtherapeutic (ineffective) levels or toxic side effects. Regular blood tests ensure that the client maintains a safe and effective level of medication in their system to prevent seizures without experiencing toxicity.