What dietary change should be considered for a patient on a potassium-sparing diuretic?

The appropriate dietary change for a patient on a potassium-sparing diuretic is to reduce potassium-rich foods. Potassium-sparing diuretics work by allowing the body to retain potassium while promoting the excretion of sodium and water. This can lead to elevated potassium levels (hyperkalemia) in susceptible individuals, especially when dietary intake is high. Therefore, it is essential for patients on these medications to limit foods that are high in potassium, such as bananas, oranges, tomatoes, and spinach, to prevent potential complications related to increased potassium levels.

In contrast, increasing sodium intake, significantly increasing fluid intake, or eating more high-fiber foods may not address the specific concern of potassium balance that is pertinent when using potassium-sparing diuretics.