A charge nurse observes smoke coming from a trash receptacle in the unit's waiting room.
Which of the following actions should the nurse take first?

- A. Calories is incorrect. Clients with Crohn's disease and enteroenteric fistula need adequate calories to prevent malnutrition and weight loss due to inflammation, malabsorption, and increased metabolic rate.

- B. Protein is incorrect. Clients with Crohn's disease and enteroenteric fistula need adequate protein to promote tissue healing and prevent protein-losing enteropathy.

- C. Potassium is incorrect. Clients with Crohn's disease and enteroenteric fistula are at risk of hypokalemia due to diarrhea, vomiting, and fistula drainage. They need to increase their potassium intake to prevent electrolyte imbalance and cardiac complications.

- D. Fiber is correct. Clients with Crohn's disease and enteroenteric fistula should decrease their fiber intake to reduce intestinal motility, bulk, and gas production, which can worsen the inflammation and fistula formation.

- A. This choice is incorrect because verapamil and TPN do not have a significant food and medication interaction. Verapamil is a calcium channel blocker that can lower blood pressure and heart rate, while TPN is a form of intravenous nutrition that provides calories, electrolytes, vitamins, and minerals. The nurse should monitor the client's vital signs and blood glucose levels, but there is no need to intervene to prevent an interaction.

- B. This choice is incorrect because phenytoin and milkshakes do not have a significant food and medication interaction. Phenytoin is an anticonvulsant that can decrease the absorption of some vitamins, such as folic acid and vitamin D, but milkshakes are not a major source of these nutrients. The nurse should encourage the client to eat a balanced diet and take supplements as prescribed, but there is no need to intervene to prevent an interaction.

- C. This choice is incorrect because potassium-rich foods and furosemide do not have a significant food and medication interaction. Furosemide is a loop diuretic that can cause hypokalemia, or low potassium levels, but potassium-rich foods can help prevent this complication. The nurse should monitor the client's electrolyte levels and fluid balance, but there is no need to intervene to prevent an interaction.

- D. This choice is correct because MAOIs and cheeseburgers have a significant food and medication interaction. MAOIs are antidepressants that can cause hypertensive crisis, or dangerously high blood pressure, if the client consumes foods that contain tyramine, such as aged cheeses, cured meats, fermented foods, and beer. The nurse should intervene to prevent the client from eating a cheeseburger and educate the client about avoiding tyramine-containing foods while taking MAOIs.