A patient taking losartan experiences dizziness upon standing. What should the nurse advise?

Choice A rationale Increasing the dose of losartan would exacerbate the patient's dizziness and hypotension. Losartan, an angiotensin II receptor blocker (ARB), works by blocking the vasoconstrictive effects of angiotensin II, leading to vasodilation and a decrease in blood pressure. An increased dose would lead to more profound vasodilation, resulting in an even greater drop in blood pressure and worsening orthostatic hypotension. This could increase the risk of falls and injury. Choice B rationale Losartan is a vasodilator, and its action can lead to a drop in blood pressure, especially when a person moves from a sitting or lying position to a standing position, a condition known as orthostatic hypotension. The dizziness is a symptom of this sudden drop in blood pressure. Changing positions slowly allows the body's baroreceptor reflex to compensate and regulate blood pressure, thus mitigating the orthostatic effect and preventing falls. Choice C rationale Taking losartan with food does not significantly alter its absorption or a patient's risk of orthostatic hypotension. Losartan can be taken with or without food. However, this action does not address the underlying physiological mechanism of orthostatic hypotension, which is a common side effect of this class of antihypertensive medications. The dizziness is directly related to the vasodilation effect, not food intake. Choice D rationale Discontinuing losartan abruptly without consulting a healthcare provider can be dangerous. It could lead to a rebound increase in blood pressure, or a hypertensive crisis, which can increase the risk of stroke or myocardial infarction. The patient should be advised to manage the side effect by changing position slowly, and if symptoms persist, they should consult their healthcare provider to discuss alternative medication options or dose adjustments.