Drug interactions
Loperamide + Spironolactone
Severity: Minor
Loperamide and Spironolactone: minor 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
Spironolactone has only weak interaction with P-glycoprotein, and any increase in loperamide exposure is unlikely to matter at usual doses. Diarrhea-related dehydration and electrolyte shifts are more relevant with spironolactone.
What this interaction means in plain words
Loperamide and Spironolactone have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Loperamide belongs to Gastrointestinal Tract; Spironolactone belongs to Cardiovascular.
Why it happens
Possible weak P-glycoprotein inhibition; not well established.
What to do
No dose change is needed. Monitor potassium and renal function if diarrhea is significant.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Loperamide
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 Loperamide with Spironolactone?
MediHelp rates the interaction as minor. Loperamide and Spironolactone have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Spironolactone has only weak interaction with P-glycoprotein, and any increase in loperamide exposure is unlikely to matter at usual doses. Diarrhea-related dehydration and electrolyte shifts are more relevant with spironolactone.
How serious is the interaction between Loperamide and Spironolactone?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No dose change is needed. Monitor potassium and renal function if diarrhea is significant.
What other medicines interact with Loperamide?
MediHelp also lists interactions of Loperamide with, for example, Amiodarone, Amisulpride, Anagrelide. The full list is on the Loperamide page.
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