Drug interactions
Calcium acetate + Carbonyl iron
Severity: Moderate
Calcium acetate and Carbonyl iron: 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 acetate, commonly used as a phosphate binder, can lower absorption of oral iron. This may blunt the response to iron therapy.
What this interaction means in plain words
Calcium acetate and Carbonyl iron 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; Carbonyl iron belongs to Miscellaneous.
Why it happens
Calcium competes with iron for intestinal uptake and forms insoluble complexes in the gut.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Calcium acetate and Carbonyl iron, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 14 days on the web. No card needed.
Other interactions of Carbonyl iron
- Aluminum hydroxide + Carbonyl iron Moderate
- Baloxavir marboxil + Carbonyl iron Moderate
- Calcium carbonate + Carbonyl iron Moderate
- Calcium + Carbonyl iron Moderate
- Carbidopa-entacapone-levodopa + Carbonyl iron Moderate
- Carbidopa-levodopa + Carbonyl iron Moderate
Other interactions of Calcium acetate
Frequently asked questions
Can I take Calcium acetate with Carbonyl iron?
MediHelp rates the interaction as moderate. Calcium acetate and Carbonyl iron 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, commonly used as a phosphate binder, can lower absorption of oral iron. This may blunt the response to iron therapy.
How serious is the interaction between Calcium acetate and Carbonyl iron?
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 Carbonyl iron?
MediHelp also lists interactions of Carbonyl iron with, for example, Aluminum hydroxide, Baloxavir marboxil, Calcium carbonate. The full list is on the Carbonyl iron page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
