Final answer:
The nurse should anticipate an increased output of dilute urine after the patient has begun taking furosemide (Lasix), a diuretic medication. Furosemide inhibits the reabsorption of sodium and chloride ions in the nephron, leading to increased osmotic pressure and urine production.
Step-by-step explanation:
The nurse should anticipate an increased output of dilute urine after the patient has begun taking furosemide (Lasix). Furosemide is a diuretic medication that works by inhibiting the reabsorption of sodium and chloride ions in the ascending limb of the loop of Henle in the nephron. By preventing the reabsorption of these ions, furosemide increases the osmotic pressure in the nephron, leading to increased urine production.