Drug interactions
Ferrous sulfate + Sodium citrate / citric acid
Severity: Minor
Ferrous sulfate and Sodium citrate / citric acid: 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
Sodium citrate buffers gastric acid and can lower iron absorption. However, citric acid itself can enhance iron absorption, so the net effect is small and uncertain.
What this interaction means in plain words
Ferrous sulfate and Sodium citrate / citric acid 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
Buffering of gastric acid may reduce iron solubility, partly offset by citrate-mediated iron solubilization.
What to do
No routine action is needed. Consider separating doses by about 2 hours if repeated use is expected, and monitor iron indices.
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 citrate / citric acid?
MediHelp rates the interaction as minor. Ferrous sulfate and Sodium citrate / citric acid have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Sodium citrate buffers gastric acid and can lower iron absorption. However, citric acid itself can enhance iron absorption, so the net effect is small and uncertain.
How serious is the interaction between Ferrous sulfate and Sodium citrate / citric acid?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No routine action is needed. Consider separating doses by about 2 hours if repeated use is expected, and monitor iron indices.
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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