Enalapril and Spironolactone Interaction
Drug interaction information between Enalapril and Spironolactone.
Enalapril and Spironolactone have a documented minor interaction in FDA labeling.
FDA drug labeling documents a minor-severity interaction between Enalapril and Spironolactone. Major interactions are generally avoided, moderate ones may need monitoring or a dose adjustment, and minor ones are usually low-risk. This page shows the documented mechanism and guidance. Label-documented interactions are not a complete safety review, so always confirm your own medications with a pharmacist or doctor. Educational information, not medical advice.
How They Interact
Both of these medications can cause your body to hold onto potassium instead of flushing it out. This can lead to dangerously high levels of potassium in your blood.
What To Do
Your doctor will need to check your blood potassium levels frequently to ensure they stay in a safe range.
FDA Label Information
Potassium-sparing diuretics (e.g., spironolactone, triamterene, or amiloride), potassium supplements, or potassium-containing salt substitutes may lead to significant increases in serum potassium.
Enalapril Also Interacts With
- Aliskiren major
- Hydralazine minor
- Lithium minor
- Prazosin minor
- Methyldopa minor
Spironolactone Also Interacts With
- Lithium moderate
- Trimethoprim moderate
- Heparin moderate
- Amlodipine/Benazepril moderate
- Benazepril moderate
Frequently Asked Questions
Can I take Enalapril and Spironolactone together?
This is a minor interaction. Your doctor will need to check your blood potassium levels frequently to ensure they stay in a safe range.
How serious is the interaction between Enalapril and Spironolactone?
This interaction is classified as "minor" severity by the FDA. Minor interactions are unlikely to cause significant problems but should still be mentioned to your healthcare provider.
Why do Enalapril and Spironolactone interact?
Both of these medications can cause your body to hold onto potassium instead of flushing it out. This can lead to dangerously high levels of potassium in your blood.
Understanding the Enalapril and Spironolactone Interaction
FDA-approved prescribing information for these two drugs flags their combination as a minor-severity interaction. Enalapril belongs to the ACE Inhibitor class and Spironolactone belongs to the Potassium-Sparing Diuretic / Aldosterone Antagonist class - two categories that can collide when co-prescribed. The mechanism described in FDA labeling is: Both of these medications can cause your body to hold onto potassium instead of flushing it out. Severity tiers matter: major flags generally advise avoidance, moderate flags often require monitoring or dose adjustment, and minor flags may only call for awareness.
Context around a specific patient determines real-world impact. Enalapril has 16 total documented interactions on file in this dataset, and Spironolactone has 23. Each additional medication compounds the interaction surface, which is why pharmacists run full-profile checks rather than evaluating one pair at a time. FDA-derived guidance for this pair is: Your doctor will need to check your blood potassium levels frequently to ensure they stay in a safe range. Timing of doses, renal and hepatic function, age, and other concurrent prescriptions all shape whether a labeled interaction matters clinically.
An interaction flag is not a verdict. A large share of labeled interactions are managed routinely in clinical practice, the fix may be as simple as spacing doses or adding a monitoring test. Others require the prescriber to choose a different medication entirely. This page surfaces FDA-sourced labeling and openFDA data for educational purposes only; it is not medical advice and cannot account for your full clinical picture. Never start, stop, or adjust either Enalapril or Spironolactone based on a web page, speak with your prescriber or pharmacist before making any change.
Sources: FDA Drug Labels (SPL) via openFDA (2026). This is for informational purposes only and is not medical advice. Always consult your healthcare provider about drug interactions.
Read our methodology - how this data is sourced, computed, and verified.