potassium chloride vs spironolactone
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Side-by-side comparison of potassium chloride and spironolactone. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
minor Known Drug Interaction
7.2 Renin-angiotensin-aldosterone Inhibitors Drugs that inhibit the renin-angiotensin-aldosterone system (RAAS) including angiotensin converting enzyme (ACE) inhibitors, angiotensin receptor blockers (ARBs), spironolactone, eplerenone, or aliskiren produce potassium retention by inhibiting aldosterone production.
Klor-Con, K-Dur
Aldactone
Potassium Chloride Extended-Release Tablets help treat or prevent low potassium levels in your blood. It comes as a tablet that slowly releases potassium into your body.
Spironolactone is a medicine that helps remove extra fluid from your body and lower blood pressure. It also helps your heart work better if you have heart failure.
This medicine treats or prevents low potassium (hypokalemia). Low potassium can happen when you don't get enough potassium from food or if you lose too much potassium. This can occur if you take water pills or other medicines.
Spironolactone is used to treat heart failure by reducing fluid build-up and helping you live longer. It also treats high blood pressure, which can lower your chance of having a stroke or heart attack. This medicine can also manage fluid build-up caused by liver problems or a kidney problem called nephrotic syndrome. It can also treat a condition where your body makes too much of a hormone called aldosterone.
Potassium is a mineral that your body needs to work properly. This medicine replaces potassium in your body. It helps keep your heart, muscles, and nerves working right.
Spironolactone belongs to a class of drugs called aldosterone antagonists. It works by blocking the effects of aldosterone, a hormone that causes your body to hold onto salt and water. By blocking aldosterone, spironolactone helps your body get rid of extra fluid and salt, which lowers blood pressure and reduces strain on the heart.
- • Nausea
- • Vomiting
- • Gas
- • Stomach pain or discomfort
- • Diarrhea
- • Breast enlargement in men
- • Dizziness
- • Headache
- Diarrhoea 7,867
- Dyspnoea 7,759
- Nausea 7,565
- Fatigue 7,534
- Death 5,492
- Dyspnoea 10,389
- Fatigue 8,178
- Nausea 7,818
- Diarrhoea 7,418
- Acute Kidney Injury 6,785
Taking potassium chloride tablets can sometimes irritate your stomach or intestines. If you have severe vomiting, stomach pain, bloating, or bleeding, stop taking this medicine and call your doctor right away.
Spironolactone can cause your potassium levels to get too high, which can be dangerous. Your doctor will check your potassium levels regularly, especially if you have kidney problems or are taking other medicines that can raise potassium. This medicine can also cause low blood pressure or make kidney problems worse. Tell your doctor if you have side effects.
Talk to your doctor if you are pregnant or breastfeeding. Potassium supplements are not expected to harm your baby if your potassium levels are normal.
Spironolactone may affect the sex organs of a baby boy if taken during pregnancy. Talk to your doctor if you are pregnant or plan to become pregnant. It is not known if spironolactone passes into breast milk, so talk to your doctor about the best way to feed your baby if you are taking this medicine.
How to Read This potassium chloride vs spironolactone Comparison
potassium chloride is classified in the Electrolyte Supplement drug class, while spironolactone sits within the Potassium-Sparing Diuretic / Aldosterone Antagonist class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. Both drugs are split between OTC and prescription status, which affects access and supervision.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, potassium chloride has 36,217 submissions while spironolactone has 40,588. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. These two drugs have a known minor interaction flagged in FDA labeling, attributed to spironolactone makes your body keep potassium, and taking it with a potassium supplement can cause the mineral to build up too much.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot represent individual circumstances. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This registry does not provide medical, treatment, substitution, or medication-change directions for potassium chloride or spironolactone.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.