Drug interactions
Mefenamic acid + Potassium acid
Severity: Moderate
Mefenamic acid and Potassium acid: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
NSAIDs can reduce renal potassium excretion by suppressing renin and aldosterone, and potassium phosphate supplements add a potassium load. Hyperkalemia may result, particularly in patients with renal impairment or other potassium-raising drugs.
What this interaction means in plain words
Mefenamic acid and Potassium acid can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
NSAID-induced hyporeninemic hypoaldosteronism and reduced renal function decrease potassium excretion, adding to supplemental potassium.
What to do
Monitor serum potassium and renal function, especially in high-risk patients, and adjust the potassium dose accordingly.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Mefenamic acid
- Ketorolac intranasal + Mefenamic acid Contraindicated
- Ketorolac + Mefenamic acid Contraindicated
- Aceclofenac + Mefenamic acid Major
- Acemetacin + Mefenamic acid Major
- Acetylsalicylic acid + Mefenamic acid Major
- Alteplase + Mefenamic acid Major
Frequently asked questions
Can I take Mefenamic acid with Potassium acid?
MediHelp rates the interaction as moderate. Mefenamic acid and Potassium acid can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. NSAIDs can reduce renal potassium excretion by suppressing renin and aldosterone, and potassium phosphate supplements add a potassium load. Hyperkalemia may result, particularly in patients with renal impairment or other potassium-raising drugs.
How serious is the interaction between Mefenamic acid and Potassium acid?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor serum potassium and renal function, especially in high-risk patients, and adjust the potassium dose accordingly.
What other medicines interact with Mefenamic acid?
MediHelp also lists interactions of Mefenamic acid with, for example, Ketorolac intranasal, Ketorolac, Aceclofenac. The full list is on the Mefenamic acid page.
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