Drug interactions
Calcium acetate + Ferrous sulfate
Severity: Minor
Calcium acetate and Ferrous 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
Calcium salts can reduce the absorption of oral iron when taken together. The practical effect is a possible reduction in iron response rather than increased calcium exposure.
What this interaction means in plain words
Calcium acetate and Ferrous 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.
Calcium acetate belongs to Genitourinary; Ferrous sulfate belongs to Miscellaneous.
Why it happens
Calcium competes with iron for intestinal uptake and may form poorly absorbed complexes.
What to do
Separate oral iron from calcium acetate by at least 2 hours. Monitor iron indices if iron deficiency persists.
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
Other interactions of Calcium acetate
Frequently asked questions
Can I take Calcium acetate with Ferrous sulfate?
MediHelp rates the interaction as minor. Calcium acetate and Ferrous 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. Calcium salts can reduce the absorption of oral iron when taken together. The practical effect is a possible reduction in iron response rather than increased calcium exposure.
How serious is the interaction between Calcium acetate and Ferrous 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: Separate oral iron from calcium acetate by at least 2 hours. Monitor iron indices if iron deficiency persists.
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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