Spironolactone and Tacrolimus: Drug Interaction Guide
Quick answer: This combination requires caution. Spironolactone and Tacrolimus can be used together with adjustments and monitoring.
How Spironolactone interacts with Tacrolimus
Both drugs raise serum potassium — spironolactone by aldosterone receptor antagonism and tacrolimus by reducing distal tubular potassium secretion — with additive hyperkalaemia risk.
What you should do
Check potassium and renal function within 1 week of starting and at each dose change; avoid additional potassium-sparing therapy and counsel on dietary potassium.
Key facts
Severity
Moderate — caution required
Mechanism
Both drugs raise serum potassium — spironolactone by aldosterone receptor antagonism and tacrolimus by reducing distal t...
Action
Check potassium and renal function within 1 week of starting and at each dose change; avoid additional potassium-sparing...
Frequently asked questions
Can I take Spironolactone and Tacrolimus together?
With caution. Check potassium and renal function within 1 week of starting and at each dose change; avoid additional potassium-sparing therapy and counsel on dietary potassium.
What is the severity of this interaction?
The interaction between Spironolactone and Tacrolimus is classified as Moderate — caution required. Both drugs raise serum potassium — spironolactone by aldosterone receptor antagonism and tacrolimus by reducing distal tubular potassium secretion — with additive hyperkalaemia risk.
What should I do if I'm prescribed both?
Check potassium and renal function within 1 week of starting and at each dose change; avoid additional potassium-sparing therapy and counsel on dietary potassium. Always consult your prescribing clinician — do not stop or change medications without medical guidance.
Last reviewed: by iMedic Medical Editorial Team. Our editorial process.