Drug interactions
Ferrous sulfate + Sodium sulfate / potassium sulfate / magnesium sulfate
Severity: Minor
Ferrous sulfate 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
This oral bowel preparation contains magnesium, which can bind oral iron in the gut and reduce its absorption. Iron therapy may be less effective if both are taken close together.
What this interaction means in plain words
Ferrous sulfate 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 cations chelate or bind iron in the gastrointestinal lumen, reducing iron absorption.
What to do
Give oral iron at least 2 hours before and at least 6 hours after each dose of the bowel preparation. Alternatively, hold iron on the day of bowel preparation.
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?
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Other interactions of Ferrous sulfate
Frequently asked questions
Can I take Ferrous sulfate with Sodium sulfate / potassium sulfate / magnesium sulfate?
MediHelp rates the interaction as minor. Ferrous sulfate 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. This oral bowel preparation contains magnesium, which can bind oral iron in the gut and reduce its absorption. Iron therapy may be less effective if both are taken close together.
How serious is the interaction between Ferrous sulfate 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: Give oral iron at least 2 hours before and at least 6 hours after each dose of the bowel preparation. Alternatively, hold iron on the day of bowel preparation.
What other medicines interact with Ferrous sulfate?
MediHelp also lists interactions of Ferrous sulfate with, for example, Ciprofloxacin, Dimercaprol, Acetohydroxamic acid. The full list is on the Ferrous sulfate page.
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