Drug interactions
Mefenamic acid + Sodium picosulfate / magnesium oxide / anhydrous citric acid
Severity: Moderate
Mefenamic acid and Sodium picosulfate / magnesium oxide / anhydrous citric 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
Bowel preparations cause fluid loss and electrolyte shifts, and NSAIDs reduce renal perfusion. Together they raise the risk of acute kidney injury, particularly in dehydrated or older patients.
What this interaction means in plain words
Mefenamic acid and Sodium picosulfate / magnesium oxide / anhydrous citric 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
Volume depletion from bowel cleansing combined with NSAID inhibition of prostaglandin-dependent renal blood flow.
What to do
Withhold the NSAID during bowel preparation where practical and ensure adequate oral fluid intake. Monitor renal function and electrolytes in high-risk patients.
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 Sodium picosulfate / magnesium oxide / anhydrous citric acid?
MediHelp rates the interaction as moderate. Mefenamic acid and Sodium picosulfate / magnesium oxide / anhydrous citric 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. Bowel preparations cause fluid loss and electrolyte shifts, and NSAIDs reduce renal perfusion. Together they raise the risk of acute kidney injury, particularly in dehydrated or older patients.
How serious is the interaction between Mefenamic acid and Sodium picosulfate / magnesium oxide / anhydrous citric 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: Withhold the NSAID during bowel preparation where practical and ensure adequate oral fluid intake. Monitor renal function and electrolytes in high-risk patients.
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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