Is Potassium Safe with Furosemide?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
This is often a therapeutic repletion scenario, not a hazard. Furosemide causes mild potassium loss (~0.3 mmol/L average). Take potassium supplements only as directed by your clinician based on lab results.
Why this interaction occurs
Furosemide causes mild potassium loss through increased urinary excretion. Potassium supplementation is often intentional and clinically appropriate in patients on loop diuretics. This is routine monitoring, not a dangerous interaction.
Evidence
Evidence level: strong.
Data source
Ferreira et al., JACC 2020; FDA Furosemide label 2025
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 274,011 reports mentioning Furosemide. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the Furosemide + 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 Potassium interactions → · All Furosemide interactions →
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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.