Does Potassium Chloride Interact With Spironolactone?
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.
Severity: Minor
Severity basis: drug interactions section. Combining Potassium Chloride (Electrolyte supplement) and Spironolactone (Potassium-sparing diuretic) is classified as a minor interaction.
What to Do
This is generally a minor interaction, but review it with your pharmacist to be sure it is safe for you.
How This Interaction Works
Interactions like this one can happen when two medicines have overlapping effects, or when one changes how the other is absorbed, broken down, or cleared from the body. Potassium Chloride is a electrolyte supplement and Spironolactone is a potassium-sparing diuretic; together they are documented as a minor interaction. How much this matters depends on your dose, your other medications, and your overall health.
If You Take Both Medications
If you have been prescribed both Potassium Chloride and Spironolactone, do not start, stop, or change either medication on your own — some medicines are unsafe to stop suddenly. Tell your prescriber and pharmacist that you take both so they can decide whether the combination is right for you, adjust the dose, monitor you more closely, or suggest an alternative.
From the FDA Label
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.
Source: FDA structured product labeling (set_id 00615fad-ad3b-46e8-a89d-48290d937ae2).
Potassium Chloride
Electrolyte supplement
Brands: Klor-Con, K-Tab
View Potassium Chloride safety profileCheck these against your full medication list in our free Interaction Checker
Frequently Asked Questions
Can you take Potassium Chloride and Spironolactone together?
Potassium Chloride and Spironolactone have a documented minor interaction. This is generally a minor interaction, but review it with your pharmacist to be sure it is safe for you.
How serious is the Potassium Chloride and Spironolactone interaction?
It is classified as a minor interaction, based on the FDA label's drug interactions section. A minor interaction is usually limited in effect but is still worth discussing with your care team.
What should I do if I'm taking both Potassium Chloride and Spironolactone?
If you have been prescribed both Potassium Chloride and Spironolactone, do not start, stop, or change either medication on your own — some medicines are unsafe to stop suddenly. Tell your prescriber and pharmacist that you take both so they can decide whether the combination is right for you, adjust the dose, monitor you more closely, or suggest an alternative.
This information is educational — not medical advice.
This page is provided for general educational purposes and summarizes publicly available data from sources such as the U.S. Food & Drug Administration. It is not a substitute for the judgment of a licensed clinician and should not be used to start, stop, or change any medication. It may be incomplete or out of date, and individual circumstances vary. Always talk with your prescriber or pharmacist about your specific medications and health conditions. If you think you may have a medical emergency, call 911.
Other Potassium Chloride Interactions
Other Spironolactone Interactions
- Spironolactone + Aspirin(moderate)
- Spironolactone + Lithium(moderate)
- Spironolactone + Lovastatin(moderate)
- Spironolactone + Olmesartan(moderate)
- Spironolactone + Pravastatin(moderate)
- Spironolactone + Valsartan(moderate)
- Spironolactone + Benazepril(minor)
- Spironolactone + Digoxin(minor)
- Spironolactone + Enalapril(minor)
- Spironolactone + Lisinopril(minor)
- Spironolactone + Ramipril(minor)