Uses, Examples, Side Effects, and Nursing Considerations

Potassium-sparing diuretics are a class of diuretic medications that help the body remove sodium and water while reducing potassium loss compared with loop and thiazide diuretics. They are important in nursing pharmacology because they affect kidney function, sodium and potassium balance, aldosterone activity, fluid balance, blood pressure, renal function, medication safety, and patient education.

Students should first understand the broader diuretic family before studying this class in depth. For a complete overview of all major diuretics, including loop, thiazide, potassium-sparing, osmotic, and carbonic anhydrase inhibitor diuretics, review the main pillar article. This supporting guide focuses specifically on potassium-sparing diuretics and explains why they are different from potassium-wasting diuretics.

Potassium-sparing diuretics are sometimes called water pills, but that term is too simple for nursing education. These medications may increase urine output, but their most important safety issue is often potassium retention. Unlike loop and thiazide diuretics, which may lower potassium, potassium-sparing diuretics may increase potassium levels and raise concern for hyperkalemia in some patients.

This article is for nursing and healthcare education only. It does not replace clinical judgment, provider orders, institutional policy, or medication guidance from a licensed healthcare professional.

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What Are Potassium-Sparing Diuretics?

Potassium-sparing diuretics are medications that promote sodium and water excretion while helping reduce potassium loss. Their name describes their key difference from loop and thiazide diuretics. They “spare” potassium by reducing potassium excretion in the distal nephron or collecting duct.

Why “Potassium-Sparing” Does Not Mean Risk-Free

The term potassium-sparing can sound reassuring, but students should not interpret it as meaning “automatically safer.” Potassium conservation can be helpful in selected clinical situations, but too much potassium can be dangerous. Hyperkalemia is a major safety concern because potassium affects muscle function and cardiac electrical activity.

This is why potassium-sparing diuretics require careful monitoring of potassium, renal function, blood pressure, symptoms, and medication interactions where clinically indicated. Sources on spironolactone and eplerenone emphasize the importance of potassium and renal function monitoring because hyperkalemia risk may increase with reduced kidney function or interacting medications (Patibandla et al., 2023; Hughes & Bhandari, 2023).

Key Terms Students Should Know

How Potassium-Sparing Diuretics Work

Potassium-sparing diuretics work mainly in the distal nephron and collecting duct. These nephron areas help regulate final sodium, potassium, and water balance before urine leaves the kidney. The exact mechanism depends on whether the medication is an aldosterone antagonist or an epithelial sodium channel blocker.

Basic Nephron Function

The nephron is the functional unit of the kidney. It filters blood, reabsorbs needed substances, and removes excess fluid or waste products. Earlier nephron segments handle large amounts of sodium and water reabsorption. The distal nephron and collecting duct make final adjustments to sodium and potassium balance.

Potassium-sparing diuretics act later in the nephron than loop diuretics. This is one reason they are usually weaker diuretics than loop diuretics. However, their potassium effect makes them clinically important.

Sodium Reabsorption and Potassium Excretion

In the distal nephron, sodium reabsorption is linked to potassium excretion. When sodium is reabsorbed, potassium may be secreted into the urine. Potassium-sparing diuretics reduce this sodium-potassium exchange pattern. As a result, sodium and water may be excreted while potassium loss is reduced.

This mechanism explains both the benefit and the risk. The benefit is potassium conservation. The risk is that potassium may rise too high, especially in patients with kidney impairment or other potassium-increasing medications.

Aldosterone’s Role

Aldosterone is a hormone that promotes sodium retention and potassium excretion in the distal nephron and collecting duct. When aldosterone activity increases, the body tends to retain sodium and water while excreting more potassium.

Aldosterone antagonists block this effect. Spironolactone and eplerenone are examples. These medications are also called mineralocorticoid receptor antagonists because they block aldosterone at the mineralocorticoid receptor (Hughes & Bhandari, 2023; Patibandla et al., 2023).

How Aldosterone Antagonists Work

Aldosterone antagonists reduce aldosterone-related sodium retention and potassium excretion. This may support fluid and blood pressure management in selected patients. These drugs are discussed in cardiovascular care, heart failure medication plans, resistant hypertension, edema, ascites, and aldosterone-related conditions depending on provider assessment.

Spironolactone is a common example. Eplerenone is more selective for mineralocorticoid receptors and is also used in selected cardiovascular contexts. Both require potassium and renal function monitoring because hyperkalemia is a major safety concern.

How ENaC Blockers Work

Epithelial sodium channel blockers reduce sodium reabsorption through ENaC channels in the distal nephron. Amiloride and triamterene are common examples. By reducing sodium reabsorption through these channels, they reduce potassium secretion and help conserve potassium.

Amiloride is described as a potassium-sparing diuretic with moderate diuretic effect compared with its potassium-sparing activity (Almajid & Cassagnol, 2024). Triamterene is also classified as a potassium-sparing diuretic and is used in fluid-retaining states and hypertension contexts under provider direction (Niyazov & Sharman, 2023).

Why Hyperkalemia Can Occur

Hyperkalemia can occur because potassium-sparing diuretics reduce potassium excretion. The risk may increase when kidney function is impaired, when potassium intake is high, or when patients take other medications that increase potassium. MSD Manual lists potassium-sparing diuretics, ACE inhibitors, ARBs, NSAIDs, and other medications among contributors to hyperkalemia (MSD Manual Professional Edition, 2024).

Nurses do not independently diagnose or treat hyperkalemia. However, nurses monitor ordered laboratory values, assess symptoms, review medication profiles within scope, document findings, and report concerns according to institutional policy.

Types of Potassium-Sparing Diuretics

Potassium-sparing diuretics are commonly grouped into two main categories: aldosterone antagonists and epithelial sodium channel blockers. Students should learn these two groups first, then attach the drug names to each group.

Aldosterone Antagonists

Aldosterone antagonists block aldosterone effects in the distal nephron and collecting duct. They reduce sodium retention and reduce potassium excretion. Spironolactone and eplerenone are the main examples nursing students should recognize.

These medications may be discussed in heart failure, resistant hypertension, edema, ascites, or aldosterone-related fluid retention depending on the clinical context. The American Heart Association includes aldosterone antagonists among medications used in heart failure care, while emphasizing that patients and caregivers should understand medication instructions from the healthcare team (American Heart Association, 2025).

Epithelial Sodium Channel Blockers

Epithelial sodium channel blockers reduce sodium reabsorption through ENaC channels in the distal nephron. Amiloride and triamterene are examples. These medications conserve potassium but still require monitoring for hyperkalemia, renal function concerns, blood pressure effects, and medication interactions.

ENaC blockers are not usually described as the strongest diuretics. StatPearls notes that ENaC inhibitors such as amiloride and triamterene are not very potent diuretics and are commonly used in situations where potassium conservation is important (Arumugham & Shahin, 2023).

Common Potassium-Sparing Diuretics

Students should learn the category first, then the drug names. The key examples are spironolactone, eplerenone, amiloride, and triamterene. A separate diuretic drugs list can compare these medications with loop, thiazide, osmotic, and carbonic anhydrase inhibitor diuretics.

Spironolactone

Spironolactone is an aldosterone antagonist. It is often discussed in heart failure, resistant hypertension, edema, ascites, and aldosterone-related conditions. It is also associated with endocrine-related effects in some patients because it is less selective than eplerenone.

Spironolactone can contribute to hyperkalemia, especially when combined with other medications that increase potassium or when renal function is impaired. Routine blood work may be used to evaluate potassium and renal function where clinically indicated (Patibandla et al., 2023).

Eplerenone

Eplerenone is a more selective aldosterone antagonist. It is used in selected cardiovascular contexts and has less affinity for androgen and progesterone receptors than spironolactone. However, hyperkalemia remains a key safety concern.

StatPearls notes that eplerenone can increase the risk of serious hyperkalemia in patients with elevated potassium or reduced renal clearance, and that certain medication interactions may increase risk (Hughes & Bhandari, 2023).

Amiloride

Amiloride is an ENaC blocker. It helps conserve potassium by reducing sodium reabsorption in the distal nephron. It is often discussed when potassium conservation is clinically important, especially in relation to other diuretic therapy.

Students should remember that amiloride is potassium-sparing, but not risk-free. Hyperkalemia and renal function concerns remain important monitoring priorities.

Triamterene

Triamterene is another ENaC blocker. It is a potassium-sparing option sometimes used in fluid-retaining states or in combination products under provider direction. Triamterene is classified as a potassium-sparing diuretic and is used in the management of edematous states (Niyazov & Sharman, 2023).

Why Are Potassium-Sparing Diuretics Used?

Potassium-sparing diuretics may be prescribed for several reasons. Their use depends on provider assessment, patient condition, renal function, potassium level, fluid status, blood pressure, medication profile, and the broader care plan.

Potassium Conservation in Diuretic Therapy

Potassium-sparing diuretics may be used when potassium conservation is clinically important. This can matter when other diuretics contribute to potassium loss or when maintaining potassium balance is part of the provider-directed treatment plan.

This does not mean patients should take potassium supplements or potassium-containing salt substitutes without provider approval. Potassium-sparing medications can increase potassium, so adding potassium from supplements or salt substitutes may raise safety concerns. The National Kidney Foundation warns patients not to take nutritional supplements without first speaking with a healthcare provider and highlights salt substitutes as a concern for people at risk of high potassium (National Kidney Foundation, n.d.).

Potassium-Sparing Diuretics in Heart Failure

Potassium-sparing diuretics, especially aldosterone antagonists, may appear in selected heart failure medication plans. In this context, the focus is not only mild diuresis. Aldosterone antagonism may support cardiovascular management by blocking aldosterone-related effects.

This article does not replace a full heart failure nursing care guide or cardiac medications article. Students should keep the heart failure discussion focused on medication class relevance, potassium monitoring, renal function monitoring, blood pressure response, and patient education.

Potassium-Sparing Diuretics for Hypertension

Some potassium-sparing diuretics may be used in selected blood pressure management contexts, including resistant hypertension, under provider direction. They may be used alone in specific cases or combined with other medications depending on the patient’s condition.

This section should not be treated as a full hypertension treatment guide. Students can review diuretics for hypertension and antihypertensive drugs for broader blood pressure medication learning.

Potassium-Sparing Diuretics for Edema or Fluid Retention

Potassium-sparing diuretics may be used in selected fluid-retention states. They may be discussed in edema, ascites, aldosterone-related fluid retention, or combination therapy contexts depending on the provider’s assessment.

Students can review diuretics for edema for broader edema-related fluid management. In this article, the main point is that potassium-sparing diuretics can support sodium and water excretion while reducing potassium loss.

Potassium-Sparing Diuretics and Electrolytes

Electrolyte safety is central to potassium-sparing diuretics. Students should not assume all diuretics lower potassium. Loop and thiazide diuretics may lower potassium, but potassium-sparing diuretics may increase potassium.

Potassium-Sparing Diuretics and Hyperkalemia

Hyperkalemia is the major electrolyte concern with potassium-sparing diuretics. Potassium is essential for muscle contraction, nerve signaling, and cardiac electrical activity. Too much potassium can create serious cardiac concerns, especially in high-risk patients.

Patients with hyperkalemia may be asymptomatic or may experience symptoms such as weakness, fatigue, palpitations, or concerning rhythm changes depending on severity and clinical context. MSD Manual identifies chronic kidney disease, acute kidney injury, advanced heart failure, urinary obstruction, ACE inhibitors, and potassium-sparing diuretics among high-risk contexts for hyperkalemia (MSD Manual Professional Edition, 2024).

Potassium-Sparing Diuretics and Sodium

Potassium-sparing diuretics promote sodium excretion while conserving potassium. This sodium loss can contribute to mild fluid and blood pressure effects, although these medications are usually less powerful diuretics than loop diuretics.

Students should connect sodium movement to water movement. When sodium excretion increases, water may follow. However, the total diuretic effect may be modest compared with medications that act earlier in the nephron.

Potassium-Sparing Diuretics and Renal Function

Renal function matters because the kidneys help regulate potassium balance. If kidney function is impaired, potassium excretion may be reduced. This can increase hyperkalemia risk when a patient is receiving potassium-sparing therapy.

This is why potassium and renal function monitoring are important where ordered. Nurses assess symptoms, review ordered laboratory results, document changes, and report abnormal findings according to policy.

Potassium-Sparing Diuretics and Other Potassium-Increasing Risks

Potassium risk may increase when potassium-sparing diuretics are combined with potassium supplements, potassium-containing salt substitutes, ACE inhibitors, ARBs, NSAIDs, or other medications that can increase potassium. MSD Manual lists several medication groups, including ACE inhibitors, ARBs, NSAIDs, and potassium-sparing diuretics, among contributors to hyperkalemia (MSD Manual Professional Edition, 2024).

Nurses should not independently stop or change medications. However, they can review medication profiles within nursing scope, identify possible safety concerns, educate patients to seek professional guidance, and report concerns to the healthcare team.

Potassium-Sparing Diuretics Side Effects

Side effects vary by medication, patient condition, renal function, age, hydration status, and other medications. Potassium-sparing diuretics are often milder diuretics, but their electrolyte effects can be clinically significant.

Hyperkalemia

Hyperkalemia is the most important safety concern. It may occur with spironolactone, eplerenone, amiloride, or triamterene, especially in higher-risk patients. Risk may increase with kidney impairment, other potassium-increasing medications, potassium supplements, or salt substitutes.

Nursing students should connect hyperkalemia risk with patient assessment and lab monitoring. Weakness, fatigue, palpitations, abnormal heart rhythm concerns, or severe dizziness should be reported according to policy.

Blood Pressure and Dizziness

Potassium-sparing diuretics may affect blood pressure. Some patients may experience dizziness or lightheadedness. Nurses assess blood pressure according to orders and monitor for orthostatic symptoms, weakness, and fall risk.

Gastrointestinal and General Symptoms

Some patients may experience nausea, gastrointestinal discomfort, headache, weakness, or fatigue. These symptoms are not specific to potassium-sparing diuretics, but they can affect adherence, comfort, and safety.

Endocrine-Related Effects

Spironolactone may cause endocrine-related effects in some patients because it is less selective than eplerenone. Merck Manual lists gynecomastia and menstrual irregularities with spironolactone among selected adverse effects of potassium-sparing diuretics (Merck Manual Professional Edition, n.d.).

Nurses should provide respectful patient education and encourage patients to report concerning or distressing effects to the healthcare provider.

Nursing Considerations for Potassium-Sparing Diuretics

Nursing considerations should be specific, practical, and safety-focused. Nurses administer potassium-sparing diuretics as prescribed and monitor the patient’s response according to provider orders and institutional policy. Providers diagnose, prescribe, and adjust treatment.

Before Giving Potassium-Sparing Diuretics

Before administration, nurses may review the medication order, patient identity, allergies, blood pressure, medication parameters, recent potassium level where available, renal function results where clinically indicated, and the reason the medication was prescribed.

The nursing focus may differ depending on whether the medication is being used for heart failure-related therapy, resistant hypertension, edema, ascites, or potassium conservation.

Potassium and Renal Function Monitoring

Potassium monitoring is central to this medication class. Nurses may monitor potassium levels where ordered and assess for symptoms that may suggest electrolyte concerns, such as weakness, palpitations, severe fatigue, confusion, fainting, or unusual symptoms.

Renal function should be reviewed where clinically indicated because impaired kidney function may increase potassium-related risk. Abnormal results should be interpreted in the clinical context and reported according to policy.

Blood Pressure and Fluid Status

Nurses should check blood pressure according to medication orders and institutional policy. They should assess dizziness, lightheadedness, weakness, or orthostatic symptoms.

When potassium-sparing diuretics are used for fluid retention, nurses may monitor edema, intake and output where ordered, daily weight where ordered, and patient-reported swelling or shortness of breath.

Medication Profile Review

Medication profile review is important within nursing scope. Nurses may identify potassium supplements, salt substitutes, ACE inhibitors, ARBs, NSAIDs, duplicate diuretic therapy, or other medications that could affect potassium, blood pressure, renal function, or fluid balance.

Nurses do not independently change therapy. They identify concerns, document findings, educate safely, and report possible issues according to policy.

Documentation and Reporting

Documentation should include medication administration, relevant assessment findings, potassium or renal function concerns where available, blood pressure response, symptoms, education provided, intake and output or weight data where ordered, abnormal findings, and provider notification when required.

Students can review diuretics nursing considerations for broader diuretic-monitoring principles.

Patient Education for Potassium-Sparing Diuretics

Patient education should be clear, safe, and within scope. Patients should take potassium-sparing diuretics exactly as prescribed and should not stop taking them without provider guidance.

Follow-Up Labs and Appointments

Patients should keep follow-up appointments and lab tests when ordered. These tests may help monitor potassium, renal function, and medication safety.

Patients should understand that “potassium-sparing” means potassium may be retained. It does not mean the medication is free of risk.

Potassium Supplements and Salt Substitutes

Patients should not use potassium supplements or potassium-containing salt substitutes unless approved by their healthcare provider. Salt substitutes may contain potassium chloride, which can raise potassium levels in some patients.

The National Kidney Foundation cautions patients to speak with a healthcare provider before taking nutritional supplements and highlights salt substitutes as an important potassium-related concern (National Kidney Foundation, n.d.).

Symptoms Patients Should Report

Patients should report severe weakness, palpitations, fainting, confusion, severe dizziness, unusual fatigue, or symptoms that feel concerning. These symptoms may be related to potassium changes, blood pressure changes, renal concerns, or another clinical issue.

Patients should also tell the healthcare team about kidney disease, heart disease, pregnancy, over-the-counter medications, herbal products, supplements, or other prescriptions.

Diet, Fluids, and Medication Safety

Patients should follow provider instructions about sodium, potassium, fluids, and diet. They should not independently change diet, fluid intake, supplements, or herbal products without professional guidance.

Patients should rise slowly if dizziness occurs and use fall-prevention strategies when appropriate. If instructed to monitor weight, they should follow the care team’s directions.

Potassium-Sparing vs Loop and Thiazide Diuretics

Potassium-sparing diuretics differ from loop and thiazide diuretics mainly in potassium effect and nephron site. Loop diuretics act in the loop of Henle and often produce stronger fluid removal. Loop diuretics may lower potassium. Thiazide diuretics act mainly in the distal convoluted tubule and may also lower potassium. Potassium-sparing diuretics act mainly in the distal nephron or collecting duct and may increase potassium.

Study Tips for Potassium-Sparing Diuretics

Students should learn potassium-sparing diuretics by category before memorizing drug names. First, remember that they conserve potassium. Second, connect them to the distal nephron and collecting duct. Third, separate aldosterone antagonists from ENaC blockers.

Category Memory

Spironolactone and eplerenone are aldosterone antagonists. They block aldosterone effects. Amiloride and triamterene are ENaC blockers. They reduce sodium reabsorption through epithelial sodium channels.

Electrolyte Memory

The major electrolyte concern is hyperkalemia. This is the opposite of the common potassium concern with loop and thiazide diuretics. A useful student memory point is: loop and thiazide diuretics may lower potassium; potassium-sparing diuretics may raise potassium.

Nursing Memory

Link side effects to assessment findings. Weakness, palpitations, severe fatigue, dizziness, fainting, or confusion should make students think about potassium, blood pressure, renal function, and medication safety.

Student memory point: Potassium-sparing diuretics act in the distal nephron or collecting duct, help conserve potassium, and require careful monitoring for hyperkalemia, renal function changes, blood pressure response, dizziness, weakness, and medication interactions.

Common Mistakes Students Make With Potassium-Sparing Diuretics

One common mistake is thinking all diuretics lower potassium. Potassium-sparing diuretics are different because they may increase potassium.

Another mistake is forgetting that hyperkalemia is the major electrolyte concern. Students should not teach patients to add potassium unless that instruction comes from the provider.

Some students confuse potassium-sparing diuretics with loop or thiazide diuretics. Loop diuretics act in the loop of Henle. Thiazides act mainly in the distal convoluted tubule. Potassium-sparing diuretics act mainly in the distal nephron or collecting duct.

Another mistake is memorizing spironolactone without understanding aldosterone. Spironolactone is important because it blocks aldosterone effects, not just because it is a “water pill.”

Students may also forget the difference between aldosterone antagonists and ENaC blockers. Spironolactone and eplerenone block aldosterone. Amiloride and triamterene block epithelial sodium channels.

Other mistakes include ignoring renal function, missing medication interaction concerns, focusing only on urine output, and assuming potassium-sparing means safer for every patient.

Summary: What Students Should Remember About Potassium-Sparing Diuretics

Potassium-sparing diuretics are a major diuretic class. They act mainly in the distal nephron or collecting duct. They help remove sodium and water while reducing potassium loss.

The class includes aldosterone antagonists and ENaC blockers. Spironolactone and eplerenone are aldosterone antagonists. Amiloride and triamterene are ENaC blockers.

The major electrolyte concern is hyperkalemia. Important monitoring includes potassium, renal function, blood pressure, dizziness, weakness, fluid status, daily weight where ordered, intake and output where ordered, and medication profile review.

Patient education should be safe and based on provider instructions. Patients should take potassium-sparing diuretics as prescribed, keep ordered follow-up labs, avoid potassium supplements or salt substitutes unless approved, and report concerning symptoms.

Potassium-sparing diuretics are best learned by connecting class, nephron site, mechanism, potassium effect, renal function, nursing monitoring, and patient teaching.

Need Help Understanding Potassium-Sparing Diuretics?

Potassium-sparing diuretics can be difficult because they involve aldosterone effects, ENaC channels, potassium retention, hyperkalemia risk, renal monitoring, medication interactions, and safe patient education. If you need help with a nursing assignment, care plan, case study, medication analysis, or pharmacology paper, our nursing academic support team can help you write a clear, evidence-based, and well-organized response.

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Frequently Asked Questions About Potassium-Sparing Diuretics

What are potassium-sparing diuretics?

Potassium-sparing diuretics are medications that help remove sodium and water while reducing potassium loss. They act mainly in the distal nephron or collecting duct. Unlike loop and thiazide diuretics, they may increase potassium levels, so hyperkalemia monitoring is important.

What are examples of potassium-sparing diuretics?

Common examples include spironolactone, eplerenone, amiloride, and triamterene. Spironolactone and eplerenone are aldosterone antagonists. Amiloride and triamterene are epithelial sodium channel blockers.

Is spironolactone a potassium-sparing diuretic?

Yes. Spironolactone is a potassium-sparing diuretic and aldosterone antagonist. It blocks aldosterone effects and may be discussed in heart failure, resistant hypertension, edema, ascites, or aldosterone-related conditions under provider direction.

How do potassium-sparing diuretics work?

They work by reducing sodium reabsorption and reducing potassium excretion in the distal nephron or collecting duct. Aldosterone antagonists block aldosterone effects, while ENaC blockers reduce sodium entry through epithelial sodium channels.

Where do potassium-sparing diuretics work in the nephron?

They work mainly in the distal nephron and collecting duct. These nephron areas help regulate final sodium and potassium balance before urine leaves the kidney.

Do potassium-sparing diuretics increase potassium?

They may increase potassium in some patients. This is why potassium monitoring is important where ordered. Hyperkalemia risk may be higher in patients with renal impairment or when combined with other potassium-increasing medications.

What is the main side effect of potassium-sparing diuretics?

Hyperkalemia is the major safety concern. Other possible effects may include dizziness, weakness, fatigue, gastrointestinal discomfort, renal function changes, and endocrine-related effects with spironolactone in some patients.

What should nurses monitor with potassium-sparing diuretics?

Nurses may monitor potassium, renal function, blood pressure, dizziness, weakness, palpitations, fluid status, intake and output where ordered, daily weight where ordered, and medication profile concerns according to institutional policy.

What should patients avoid with potassium-sparing diuretics?

Patients should avoid potassium supplements, potassium-containing salt substitutes, herbal products, or natural diuretics unless approved by their healthcare provider. They should also ask a provider or pharmacist before starting new over-the-counter medications or supplements.

How are potassium-sparing diuretics different from loop and thiazide diuretics?

Potassium-sparing diuretics may increase potassium, while loop and thiazide diuretics may lower potassium. They also act mainly in the distal nephron or collecting duct, while loop diuretics act in the loop of Henle and thiazides act mainly in the distal convoluted tubule.

References

Almajid, A. N., & Cassagnol, M. (2024). Amiloride. In StatPearls. StatPearls Publishing. https://www.ncbi.nlm.nih.gov/books/NBK542303/

American Heart Association. (2025, June 17). Medications used to treat heart failure. https://www.heart.org/en/health-topics/heart-failure/treatment-options-for-heart-failure/medications-used-to-treat-heart-failure

Arumugham, V. B., & Shahin, M. H. (2023). Therapeutic uses of diuretic agents. In StatPearls. StatPearls Publishing. https://www.ncbi.nlm.nih.gov/books/NBK557838/

Hughes, J. C., & Bhandari, S. (2023). Eplerenone. In StatPearls. StatPearls Publishing. https://www.ncbi.nlm.nih.gov/books/NBK553100/

Merck Manual Professional Edition. (n.d.). Oral diuretics for hypertension. Retrieved May 28, 2026, from https://www.merckmanuals.com/professional/multimedia/table/oral-diuretics-for-hypertension

MSD Manual Professional Edition. (2024). Hyperkalemia. https://www.msdmanuals.com/professional/nephrology/electrolyte-disorders/hyperkalemia

National Kidney Foundation. (n.d.). Your kidneys and high potassium. Retrieved May 28, 2026, from https://www.kidney.org/sites/default/files/hyperkalemia.pdf

Niyazov, R., & Sharman, T. (2023). Triamterene. In StatPearls. StatPearls Publishing. https://www.ncbi.nlm.nih.gov/books/NBK557650/

Patibandla, S., Heaton, J., & Kyaw, H. (2023). Spironolactone. In StatPearls. StatPearls Publishing. https://www.ncbi.nlm.nih.gov/books/NBK554421/