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?

A. "I will expect to have dark urine while taking this medication": Dark urine is not a typical side effect of phenytoin. If a client notices dark urine, it may be a sign of liver issues or hematuria, which should be reported to the healthcare provider. B. "I will take an extra dose of the medication if I have a breakthrough seizure": Taking an extra dose in response to a breakthrough seizure is not recommended. It is essential to follow the prescribed dosing schedule, and any changes or concerns should be discussed with the healthcare provider. C. "I will have my blood checked to monitor the medication levels": Phenytoin has a narrow therapeutic range, and blood levels should be regularly monitored to ensure the medication is within the therapeutic range to avoid toxicity and ensure effective seizure control. D. "I will take this medication with an antacid to prevent indigestion": Antacids can interfere with the absorption of phenytoin, reducing its effectiveness. It is important to avoid taking phenytoin with antacids and to follow the recommended administration guidelines.