A nurse is teaching a client who has a seizure disorder and has a new prescription for phenytoin. Which of the following client statements indicates an understanding of the teaching?

"I will expect to have dark urine while taking this medication."

"I will take an extra dose of the medication if I have a breakthrough seizure."

"I will have my blood checked to monitor the medication levels."

"I will take this medication with an antacid to prevent indigestion."