Drug interactions
Ferrous sulfate + Sodium bicarbonate
Severity: Moderate
Ferrous sulfate and Sodium bicarbonate: 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
Sodium bicarbonate neutralizes gastric acid, which reduces dissolution and absorption of oral iron. Iron therapy may become less effective with repeated antacid use.
What this interaction means in plain words
Ferrous sulfate and Sodium bicarbonate 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.
Ferrous sulfate belongs to Miscellaneous; Sodium bicarbonate belongs to Gastrointestinal Tract.
Why it happens
Raised gastric pH decreases iron solubility and forms poorly absorbed iron complexes.
What to do
Separate iron from the antacid by at least 2 hours. Monitor hemoglobin and ferritin if antacid use is frequent.
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 sulfate
Other interactions of Sodium bicarbonate
- Acetylsalicylic acid + Sodium bicarbonate Moderate
- Alendronate + Sodium bicarbonate Moderate
- Amantadine + Sodium bicarbonate Moderate
- Carbonyl iron + Sodium bicarbonate Moderate
- Cefditoren + Sodium bicarbonate Moderate
- Cefpodoxime + Sodium bicarbonate Moderate
Frequently asked questions
Can I take Ferrous sulfate with Sodium bicarbonate?
MediHelp rates the interaction as moderate. Ferrous sulfate and Sodium bicarbonate 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. Sodium bicarbonate neutralizes gastric acid, which reduces dissolution and absorption of oral iron. Iron therapy may become less effective with repeated antacid use.
How serious is the interaction between Ferrous sulfate and Sodium bicarbonate?
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 the antacid by at least 2 hours. Monitor hemoglobin and ferritin if antacid use is frequent.
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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