Drug interactions
Naproxen + Spironolactone
Severity: Major
Naproxen and Spironolactone: major interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
NSAIDs can blunt the diuretic and antihypertensive effects of spironolactone and raise serum potassium. Together with renal function decline, this may cause clinically significant hyperkalemia and acute kidney injury.
What this interaction means in plain words
Naproxen and Spironolactone can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Naproxen belongs to Musculoskeletal; Spironolactone belongs to Cardiovascular.
Why it happens
NSAIDs reduce prostaglandin-mediated renal blood flow and renin release, causing hypoaldosteronism and reduced potassium excretion, which adds to aldosterone antagonism.
What to do
Avoid regular NSAID use in patients on spironolactone, especially with CKD, heart failure or older age. If needed, monitor potassium, creatinine and blood pressure within the first week and periodically after.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Naproxen
- Ketorolac intranasal + Naproxen Contraindicated
- Ketorolac + Naproxen Contraindicated
- Aceclofenac + Naproxen Major
- Acemetacin + Naproxen Major
- Acetylsalicylic acid + Naproxen Major
- Alteplase + Naproxen Major
Other interactions of Spironolactone
- Amiloride + Spironolactone Contraindicated
- Eplerenone + Spironolactone Contraindicated
- Spironolactone + Triamterene Contraindicated
- Abiraterone + Spironolactone Major
- Aceclofenac + Spironolactone Major
- Acemetacin + Spironolactone Major
Frequently asked questions
Can I take Naproxen with Spironolactone?
MediHelp rates the interaction as major. Naproxen and Spironolactone can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. NSAIDs can blunt the diuretic and antihypertensive effects of spironolactone and raise serum potassium. Together with renal function decline, this may cause clinically significant hyperkalemia and acute kidney injury.
How serious is the interaction between Naproxen and Spironolactone?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid regular NSAID use in patients on spironolactone, especially with CKD, heart failure or older age. If needed, monitor potassium, creatinine and blood pressure within the first week and periodically after.
What other medicines interact with Naproxen?
MediHelp also lists interactions of Naproxen with, for example, Ketorolac intranasal, Ketorolac, Aceclofenac. The full list is on the Naproxen page.
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