Final answer:
Losartan is an angiotensin receptor blocker used for the treatment of hypertension. The nurse would clarify the use of losartan if the client has renal stenosis.
Step-by-step explanation:
Losartan is an angiotensin receptor blocker (ARB) used for the treatment of hypertension. It works by blocking the action of angiotensin II, a hormone that constricts blood vessels, thereby reducing blood pressure. The nurse would clarify the use of losartan if the client has renal stenosis, as this condition can be exacerbated by the use of ARBs.