Drug interactions
Mefenamic acid + Sodium sulfate / ?magnesium sulfate / potassium chloride
Severity: Moderate
Mefenamic acid and Sodium sulfate / ?magnesium sulfate / potassium chloride: 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
Osmotic bowel preparations cause fluid and electrolyte disturbances, and NSAIDs impair renal perfusion and can promote water retention. Together they increase the risk of acute kidney injury and electrolyte-related complications such as arrhythmia or seizures.
What this interaction means in plain words
Mefenamic acid and Sodium sulfate / ?magnesium sulfate / potassium chloride 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
Bowel-prep-induced volume depletion and electrolyte shifts combined with NSAID reduction of renal prostaglandins and effects on water handling.
What to do
Hold the NSAID around the bowel preparation where possible and encourage adequate hydration. Check electrolytes and renal function in patients at risk.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Mefenamic acid and Sodium sulfate / ?magnesium sulfate / potassium chloride, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 14 days on the web. No card needed.
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 sulfate / ?magnesium sulfate / potassium chloride?
MediHelp rates the interaction as moderate. Mefenamic acid and Sodium sulfate / ?magnesium sulfate / potassium chloride 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. Osmotic bowel preparations cause fluid and electrolyte disturbances, and NSAIDs impair renal perfusion and can promote water retention. Together they increase the risk of acute kidney injury and electrolyte-related complications such as arrhythmia or seizures.
How serious is the interaction between Mefenamic acid and Sodium sulfate / ?magnesium sulfate / potassium chloride?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Hold the NSAID around the bowel preparation where possible and encourage adequate hydration. Check electrolytes and renal function in patients at risk.
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.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
