Drug interactions
ferrous fumarate + magnesium glycinate
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.
Overview
Magnesium can bind with oral iron in the GI tract, decreasing iron absorption and potentially reducing iron therapy effectiveness.
Mechanism of action
Intraluminal chelation/formation of insoluble complexes between divalent cations and iron, reducing bioavailability.
Clinical management
Separate administration by at least 2–4 hours; avoid taking together. Monitor hemoglobin, ferritin, and clinical response to iron therapy.
Drug reference
References
- Iron Salts (Oral): Drug Interactions — Lexicomp
- Managing interactions with oral iron — SPS
- Treatment of iron deficiency anemia in adults — UpToDate
Frequently asked questions
Can I take ferrous fumarate with magnesium glycinate?
The interaction is rated: Moderate. Magnesium can bind with oral iron in the GI tract, decreasing iron absorption and potentially reducing iron therapy effectiveness.
How serious is the interaction between ferrous fumarate and magnesium glycinate?
The interaction is rated: Moderate. Evidence level: Moderate.
How is the interaction between ferrous fumarate and magnesium glycinate managed?
Separate administration by at least 2–4 hours; avoid taking together. Monitor hemoglobin, ferritin, and clinical response to iron therapy.
Why do ferrous fumarate and magnesium glycinate interact?
Intraluminal chelation/formation of insoluble complexes between divalent cations and iron, reducing bioavailability.
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