Is Magnesium Safe with Spironolactone?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Routine magnesium supplementation is generally not needed with spironolactone unless deficiency is documented. If supplementing for other reasons, inform your doctor and have renal function and electrolytes monitored, especially if kidney function is reduced.
Why this interaction occurs
Spironolactone modestly reduces urinary magnesium excretion as part of its potassium-sparing mechanism. In patients with renal impairment, co-administration of magnesium supplements may increase risk of hypermagnesemia. This interaction is less critical than the potassium interaction but warrants clinical awareness.
Evidence
Evidence level: limited.
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 116,020 reports mentioning Spironolactone. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the Spironolactone + supplement combination on this page.
FAERS reports are voluntary and cannot prove that a drug caused an event. Do not use report counts to assess the safety of this specific drug-supplement pair.
Frequently asked questions
Related interactions
All Magnesium interactions → · All Spironolactone interactions →
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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.