Drug interactions
Ferrous fumarate + Sodium sulfate / potassium sulfate / magnesium sulfate
Severity: Minor
Ferrous fumarate and Sodium sulfate / potassium sulfate / magnesium sulfate: minor 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
Oral iron taken near this sulfate bowel preparation may be poorly absorbed. Magnesium can bind iron and the purgative effect speeds transit through the gut. The effect is transient and of limited clinical consequence.
What this interaction means in plain words
Ferrous fumarate and Sodium sulfate / potassium sulfate / magnesium sulfate have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Magnesium chelation and accelerated intestinal transit reduce iron absorption.
What to do
Take iron at least 2 hours before or 6 hours after each preparation dose. Resume routine iron dosing after the bowel cleansing is complete.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Ferrous fumarate and Sodium sulfate / potassium sulfate / magnesium sulfate, 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 Ferrous fumarate
Frequently asked questions
Can I take Ferrous fumarate with Sodium sulfate / potassium sulfate / magnesium sulfate?
MediHelp rates the interaction as minor. Ferrous fumarate and Sodium sulfate / potassium sulfate / magnesium sulfate have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Oral iron taken near this sulfate bowel preparation may be poorly absorbed. Magnesium can bind iron and the purgative effect speeds transit through the gut. The effect is transient and of limited clinical consequence.
How serious is the interaction between Ferrous fumarate and Sodium sulfate / potassium sulfate / magnesium sulfate?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Take iron at least 2 hours before or 6 hours after each preparation dose. Resume routine iron dosing after the bowel cleansing is complete.
What other medicines interact with Ferrous fumarate?
MediHelp also lists interactions of Ferrous fumarate with, for example, Ciprofloxacin, Acetohydroxamic acid, Aluminum hydroxide. The full list is on the Ferrous fumarate 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.
