A patient on an ACE inhibitor reports a dry cough. What is the most appropriate nursing response?

Choice A rationale This response is incorrect because a persistent, dry cough in a patient on an ACE inhibitor is a significant adverse effect requiring medical evaluation. It is not something that will simply resolve on its own. The cough is thought to be caused by the accumulation of bradykinin and substance P in the lungs, which occurs due to the inhibition of the ACE enzyme, which normally degrades these peptides. This is a common but bothersome side effect that warrants a change in medication. Choice B rationale While increasing fluid intake is generally beneficial for health, it is not an effective treatment for a medication-induced cough. The cough is a direct result of the pharmacological action of the ACE inhibitor on the kinin-kallikrein system, not dehydration. The patient's cough is a physiological response to the medication, and fluids will not mitigate the underlying biochemical process causing the bradykinin accumulation and airway irritation. Choice C rationale This is the most appropriate action. The dry cough is a classic and common side effect of ACE inhibitors, affecting up to 20% of patients. It is caused by the accumulation of bradykinin, a vasodilator peptide, due to the inhibition of angiotensin-converting enzyme. This persistent and often irritating symptom may necessitate a change to an alternative class of antihypertensive drugs, such as an angiotensin II receptor blocker (ARB), which does not affect bradykinin levels. Choice D rationale Discontinuing the medication without consulting the healthcare provider is unsafe and outside the scope of nursing practice. Abruptly stopping an antihypertensive drug can lead to a dangerous rebound effect, causing a sudden and severe increase in blood pressure, known as a hypertensive crisis. The decision to change or stop a medication must always be made by the prescribing healthcare provider after evaluating the benefits versus the side effects.