The nurse notifies the healthcare provider (HCP) that the client is having trouble remembering to take his second dose of captopril. What angiotensin-converting enzyme (ACE) inhibitors can be given only once per day? Select all that apply.

Captopril is an angiotensin converting enzyme inhibitor that works by vasodilation.

Choice A: Angiotensin Converting Enzyme Inhibitor

Reason:

Captopril is classified as an angiotensin converting enzyme (ACE) inhibitor. ACE inhibitors work by blocking the conversion of angiotensin I to angiotensin II, a potent vasoconstrictor. By inhibiting this conversion, ACE inhibitors reduce the levels of angiotensin II, leading to vasodilation, decreased blood pressure, and reduced workload on the heart. This mechanism is particularly beneficial in managing hypertension and heart failure. Additionally, ACE inhibitors like captopril help in reducing the progression of diabetic nephropathy by decreasing glomerular pressure.

Choice B: Aldosterone Agonist

Reason:

Aldosterone agonists are drugs that mimic the action of aldosterone, a hormone that increases sodium and water reabsorption in the kidneys, leading to increased blood volume and blood pressure. This is the opposite of what captopril does. Captopril, as an ACE inhibitor, actually reduces aldosterone secretion, leading to decreased sodium and water retention, which helps lower blood pressure. Therefore, captopril cannot be classified as an aldosterone agonist.

Choice C: Angiotensin II Receptor Blocker

Reason:

Angiotensin II receptor blockers (ARBs) work by blocking the action of angiotensin II at its receptor sites, preventing vasoconstriction and aldosterone secretion. While ARBs and ACE inhibitors both target the renin-angiotensin-aldosterone system (RAAS), they do so at different points. Captopril is an ACE inhibitor, not an ARB. ARBs include drugs like losartan and valsartan, which are used when patients cannot tolerate ACE inhibitors due to side effects like coug.

Choice D: Lowering the Heart Rate

Reason:

Lowering the heart rate is not the primary mechanism of action for captopril. This effect is more commonly associated with beta-blockers, which reduce heart rate and myocardial contractility to lower blood pressure and reduce cardiac workload. Captopril, on the other hand, primarily works through vasodilation by inhibiting the formation of angiotensin II. While it may have some indirect effects on heart rate by reducing blood pressure, this is not its main mechanism.

Choice E: Reducing Inflammation

Reason:

Reducing inflammation is not a primary action of captopril. Anti-inflammatory effects are typically associated with nonsteroidal anti-inflammatory drugs (NSAIDs) or corticosteroids. While there is some evidence that ACE inhibitors may have minor anti-inflammatory effects due to their impact on the RAAS, this is not their primary function. Captopril is mainly used for its vasodilatory effects to manage hypertension and heart failure.

Choice F: Diuresis

Reason:

Diuresis, or increased urine production, is not the primary mechanism of action for captopril. Diuretics, such as furosemide or hydrochlorothiazide, are specifically used to promote diuresis by acting on different parts of the renal tubules to increase the excretion of sodium and water. While captopril can lead to mild diuresis by reducing aldosterone levels, this is not its main therapeutic action.

Choice G: Vasodilation

Reason:

Vasodilation is the correct mechanism of action for captopril. By inhibiting the conversion of angiotensin I to angiotensin II, captopril reduces vasoconstriction and promotes vasodilation. This leads to a decrease in blood pressure and an overall reduction in the workload on the heart. Vasodilation is a key therapeutic effect of ACE inhibitors, making them effective in treating conditions like hypertension and heart failure.

Choice A Reason:

Antiretroviral medications are effective in decreasing AIDS-related complications. These medications work by reducing the viral load in the body, which helps to maintain the immune system and prevent the progression of HIV to AIDS. By keeping the viral load low, the risk of opportunistic infections and other complications associated with AIDS is significantly reduced.

Choice B Reason:

One of the primary goals of antiretroviral therapy (ART) is to decrease the viral load to an undetectable level. When the viral load is undetectable, it means that the amount of HIV in the blood is so low that it cannot be detected by standard laboratory tests. Achieving and maintaining an undetectable viral load is crucial for the health of the individual and helps to prevent the progression of the disease.

Choice C Reason:

It is important to understand that while antiretroviral therapy can control HIV infection and reduce the viral load to undetectable levels, it does not cure the infection. HIV remains in the body, and if the medication is stopped, the viral load will increase again. Continuous adherence to the medication regimen is necessary to keep the virus under control and maintain health.

Choice D Reason:

While antiretroviral therapy significantly reduces the risk of HIV transmission, it does not completely prevent it. The concept of “undetectable = untransmittable” (U=U) means that individuals with an undetectable viral load have effectively no risk of transmitting the virus through sex7. However, it is still important to use other preventive measures, such as condoms, to further reduce the risk of transmission.