NutriStack
Naproxen and Potassium, a caution.
Naproxen can impair kidney potassium handling, and potassium supplements can add enough potassium to cause hyperkalemia in susceptible people. Risk is higher with kidney disease, diabetes, dehydration, older age, ACE inhibitors, ARBs, or potassium-sparing diuretics. Hyperkalemia may be silent until it causes weakness or heart rhythm problems.
One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
Same shape as the other 1,729 pairs in the public database.
From the interaction database
What the row says.
Every entry follows the same shape: what is happening, the mechanism, the recommendation, and the primary literature.
At a glance
- Pair type
- Caution
- Evidence (highest tier)
- Moderate
- Source citations
- 2 sources
- Stack Score effect
- −5 to your Stack Score (per scored caution row).
- Scope
- Supplement × Prescription
- Last verified
- May 30, 2026
Caution · Moderate evidence
Caution
What is happening. Naproxen can impair kidney potassium handling, and potassium supplements can add enough potassium to cause hyperkalemia in susceptible people. Risk is higher with kidney disease, diabetes, dehydration, older age, ACE inhibitors, ARBs, or potassium-sparing diuretics. Hyperkalemia may be silent until it causes weakness or heart rhythm problems.
Mechanism. Naproxen inhibits renal prostaglandin synthesis, which can suppress renin and aldosterone and reduce distal potassium secretion. Added potassium intake can exceed renal excretory capacity when this pathway is impaired.
Recommendation. Avoid potassium supplements during repeated naproxen use unless a clinician is monitoring you. If you need both, check serum potassium and kidney function, and stop naproxen during significant dehydration or acute illness unless told otherwise.
Stack Score
How this pair moves the number.
Effect on the composite score
If both Naproxen and Potassium are in the same stack, this pair applies −5 to your Stack Score (per scored caution row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
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