Drug interactions
Iron + Sodium sulfate / potassium sulfate / magnesium sulfate
Severity: Minor
Iron 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 is typically withheld before bowel preparation, as iron can darken stool and impair visualization at colonoscopy. Rapid bowel transit during the preparation also reduces iron absorption.
What this interaction means in plain words
Iron 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
Osmotic laxative effect shortens intestinal transit and reduces iron absorption, while residual iron stains stool and may obscure the mucosa.
What to do
Hold oral iron for several days before colonoscopy per local preparation protocol, and resume afterwards.
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 Iron
- Acetohydroxamic acid + Iron Moderate
- Aluminum hydroxide + Iron Moderate
- Baloxavir marboxil + Iron Moderate
- Calcium acetate + Iron Moderate
- Calcium carbonate + Iron Moderate
- Calcium citrate + Iron Moderate
Frequently asked questions
Can I take Iron with Sodium sulfate / potassium sulfate / magnesium sulfate?
MediHelp rates the interaction as minor. Iron 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 is typically withheld before bowel preparation, as iron can darken stool and impair visualization at colonoscopy. Rapid bowel transit during the preparation also reduces iron absorption.
How serious is the interaction between Iron 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: Hold oral iron for several days before colonoscopy per local preparation protocol, and resume afterwards.
What other medicines interact with Iron?
MediHelp also lists interactions of Iron with, for example, Acetohydroxamic acid, Aluminum hydroxide, Baloxavir marboxil. The full list is on the Iron page.
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