NutriStack
Diclofenac and Potassium, a caution.
Diclofenac can impair kidney potassium excretion, and potassium supplements can make hyperkalemia more likely. Risk is higher during dehydration or acute illness and in people with kidney disease, diabetes, older age, ACE inhibitors, ARBs, or potassium-sparing diuretics. High potassium may cause weakness, palpitations, or dangerous rhythm changes.
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
- Substances
- Diclofenac and Potassium
- 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. Diclofenac can impair kidney potassium excretion, and potassium supplements can make hyperkalemia more likely. Risk is higher during dehydration or acute illness and in people with kidney disease, diabetes, older age, ACE inhibitors, ARBs, or potassium-sparing diuretics. High potassium may cause weakness, palpitations, or dangerous rhythm changes.
Mechanism. Diclofenac blocks renal prostaglandin production, which can suppress renin and aldosterone and reduce potassium secretion in the distal nephron. Supplemental potassium increases the filtered and extracellular potassium load.
Recommendation. Avoid potassium supplements during repeated diclofenac use unless your clinician is monitoring potassium and kidney function. Stop diclofenac and seek advice during vomiting, diarrhea, poor intake, or dehydration.
Stack Score
How this pair moves the number.
Effect on the composite score
If both Diclofenac 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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