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HomePharmacologyFerrous Sulfate

Ferrous Sulfate

Oral Iron Supplement
Drug Class
Oral Iron Supplement
Mechanism of Action (MOA)
Supplies elemental iron for hemoglobin synthesis, correcting iron-deficient erythropoiesis.
Black Box Warning
FDA-required iron warning (boxed on only some OTC SPLs, not an Rx boxed warning): accidental overdose of iron products is a leading cause of fatal poisoning in children under 6; keep out of reach.
Clinical Notes
Iron supplement for iron deficiency and iron-deficiency anemia. GI discomfort, constipation/diarrhea — label advises taking after meals. Separate from oral tetracyclines by 2 h. Treat anemia under clinician supervision.
Source
FDA label

Sources

Reviewed September 2026
  1. FDA label — FDA / DailyMed

Checked against the guideline or standard reference the exam keys to. If it has moved, use Report an error below.

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