A patient on Lasix should increase their intake of which food?

The correct choice reflects the need for increased potassium intake for patients taking Lasix, which is a diuretic. Lasix, or furosemide, is known to cause potassium depletion due to its mechanism of increasing urine production and thereby promoting the excretion of electrolytes, including potassium.

Cantaloupe is a potassium-rich fruit, making it an excellent choice for supplementation in the diet of someone on Lasix. Consuming cantaloupe can help mitigate the risk of hypokalemia, which is a common side effect of diuretics.

In contrast, iceberg lettuce, while containing some nutrients, is relatively low in potassium. Plums and apples also contain potassium, but not as significantly as cantaloupe. Therefore, the selection of cantaloupe specifically addresses the dietary need for increased potassium intake in patients using Lasix.