A nurse is providing teaching to an older adult client who has a seizure disorder and a new prescription for phenytoin. Which of the following instructions should the nurse include?

A) Advising the client to limit foods containing vitamin D is not appropriate. Phenytoin can lead to decreased vitamin D levels, making it important to maintain adequate vitamin D intake to support bone health. Therefore, there is no need to restrict these foods. B) Taking phenytoin with food can help reduce gastrointestinal side effects and improve absorption, making this instruction crucial for the client’s adherence to the medication regimen. It is important for older adults, who may be more sensitive to medications, to have guidance on how to take their medications effectively. C) Planning to take phenytoin with antacids is not advisable, as antacids can interfere with the absorption of phenytoin. The nurse should instruct the client to space these medications apart to avoid reduced effectiveness of phenytoin. D) Limiting foods that contain folic acid is unnecessary and not typically advised. In fact, folic acid is important for overall health, and some patients on phenytoin may need additional folic acid supplementation, especially if they have a deficiency. Therefore, this instruction may lead to unintended nutritional deficiencies.