Drug interactions
Lofexidine + Spironolactone
Severity: Moderate
Lofexidine 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
Lofexidine lowers blood pressure and heart rate, and spironolactone adds a mild blood pressure lowering effect. The combination can cause hypotension and dizziness, though potassium-sparing diuretics do not usually cause the hypokalemia that worsens QT risk.
What this interaction means in plain words
Lofexidine 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.
Lofexidine belongs to Central Nervous System; Spironolactone belongs to Cardiovascular.
Why it happens
Additive hypotensive effects of central alpha-2 agonism and diuretic-induced volume reduction.
What to do
Monitor blood pressure and heart rate, particularly when starting or adjusting either drug. Reduce the dose if symptomatic hypotension or bradycardia occurs.
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 Lofexidine
- Adagrasib + Lofexidine Major
- Alfuzosin + Lofexidine Major
- Amiodarone + Lofexidine Major
- Amisulpride + Lofexidine Major
- Anagrelide + Lofexidine Major
- Apomorphine + Lofexidine Major
Frequently asked questions
Can I take Lofexidine with Spironolactone?
MediHelp rates the interaction as moderate. Lofexidine 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. Lofexidine lowers blood pressure and heart rate, and spironolactone adds a mild blood pressure lowering effect. The combination can cause hypotension and dizziness, though potassium-sparing diuretics do not usually cause the hypokalemia that worsens QT risk.
How serious is the interaction between Lofexidine 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 and heart rate, particularly when starting or adjusting either drug. Reduce the dose if symptomatic hypotension or bradycardia occurs.
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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