Drug interactions
Minoxidil + Spironolactone
Severity: Moderate
Minoxidil and Spironolactone: moderate 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
Both lower blood pressure, so combined use can produce additive hypotension. In practice they are often used together deliberately, since spironolactone helps counter the sodium and fluid retention caused by minoxidil.
What this interaction means in plain words
Minoxidil and Spironolactone can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Minoxidil belongs to Cardiovascular; Spironolactone belongs to Cardiovascular.
Why it happens
Additive antihypertensive effects from vasodilation (minoxidil) and diuresis with aldosterone antagonism (spironolactone).
What to do
Monitor blood pressure, heart rate and fluid status when starting or adjusting either drug. Adjust doses to avoid symptomatic hypotension.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Spironolactone
- Amiloride + Spironolactone Contraindicated
- Eplerenone + Spironolactone Contraindicated
- Spironolactone + Triamterene Contraindicated
- Abiraterone + Spironolactone Major
- Aceclofenac + Spironolactone Major
- Acemetacin + Spironolactone Major
Other interactions of Minoxidil
Frequently asked questions
Can I take Minoxidil with Spironolactone?
MediHelp rates the interaction as moderate. Minoxidil and Spironolactone can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Both lower blood pressure, so combined use can produce additive hypotension. In practice they are often used together deliberately, since spironolactone helps counter the sodium and fluid retention caused by minoxidil.
How serious is the interaction between Minoxidil and Spironolactone?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor blood pressure, heart rate and fluid status when starting or adjusting either drug. Adjust doses to avoid symptomatic hypotension.
What other medicines interact with Spironolactone?
MediHelp also lists interactions of Spironolactone with, for example, Amiloride, Eplerenone, Triamterene. The full list is on the Spironolactone page.
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