Drug interactions
Calcium acetate + Ferrous fumarate
Severity: Moderate
Calcium acetate and Ferrous fumarate: moderate 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 given with oral iron can lower iron absorption. Calcium acetate used as a phosphate binder also binds iron in the gut, which can blunt the response to iron therapy.
What this interaction means in plain words
Calcium acetate and Ferrous fumarate can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Calcium acetate belongs to Genitourinary; Ferrous fumarate belongs to Miscellaneous.
Why it happens
Calcium competes with iron for intestinal uptake and forms insoluble complexes in the gut lumen.
What to do
Separate iron from calcium acetate by at least 2 hours. Monitor ferritin, transferrin saturation and hemoglobin.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Ferrous fumarate
Other interactions of Calcium acetate
Frequently asked questions
Can I take Calcium acetate with Ferrous fumarate?
MediHelp rates the interaction as moderate. Calcium acetate and Ferrous fumarate can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Calcium salts given with oral iron can lower iron absorption. Calcium acetate used as a phosphate binder also binds iron in the gut, which can blunt the response to iron therapy.
How serious is the interaction between Calcium acetate and Ferrous fumarate?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Separate iron from calcium acetate by at least 2 hours. Monitor ferritin, transferrin saturation and hemoglobin.
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.
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