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.
“Plan to take this medication with food.”
B.
“Plan to take this medication with antacids.”
C.
“Limit foods that contain vitamin D while taking this medication.”
D.
“Limit foods that contain folic acid while taking this medication.”
The Correct answer and Explanation is:
The correct answer is A. “Plan to take this medication with food.”
Explanation:
Phenytoin is an anticonvulsant medication commonly prescribed for managing seizure disorders. Its absorption can be affected by food intake, which is an essential consideration for patient education. Here’s why option A is the most appropriate instruction:
- Absorption and Gastrointestinal Comfort: Taking phenytoin with food can enhance its absorption and reduce gastrointestinal irritation. Food can help mitigate any potential stomach upset, a common side effect of many medications, including phenytoin. Patients often tolerate the medication better when taken with meals, which encourages adherence to the prescribed regimen.
- Drug Interactions: Options B, C, and D provide instructions that may lead to adverse effects or reduced efficacy of phenytoin:
- B. “Plan to take this medication with antacids.” This instruction is misleading because antacids can decrease the absorption of phenytoin. Antacids containing magnesium or aluminum should be taken at least 2 hours apart from phenytoin to prevent interaction.
- C. “Limit foods that contain vitamin D while taking this medication.” This is incorrect because phenytoin can actually decrease the levels of vitamin D in the body. However, it’s not about limiting vitamin D intake but rather monitoring vitamin levels, as phenytoin can induce hepatic enzymes that metabolize vitamin D.
- D. “Limit foods that contain folic acid while taking this medication.” This is also misleading. Folic acid is crucial for health, especially in women of childbearing age. Phenytoin can interfere with folate metabolism, and adequate folic acid intake is important, rather than limiting it.
In summary, the best practice for a patient on phenytoin is to take it with food to improve absorption and reduce side effects, while also being aware of the interactions with other substances. Proper teaching ensures better management of the seizure disorder and enhances patient safety.