Drug interactions
Iron dextran complex + Methyldopa
Severity: Moderate
Iron dextran complex and Methyldopa: 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
Oral iron salts reduce methyldopa absorption and may weaken blood pressure control. Parenteral iron dextran is not expected to affect gut absorption, so the interaction applies to oral iron only.
What this interaction means in plain words
Iron dextran complex and Methyldopa 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.
Why it happens
Iron forms a chelate complex with methyldopa in the gastrointestinal tract, decreasing its absorption.
What to do
If oral iron is used, separate it from methyldopa by at least 2 hours and monitor blood pressure. No separation is needed for injectable iron.
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 Methyldopa
- Methyldopa + Tranylcypromine Contraindicated
- Iobenguane i + Methyldopa Major
- Lofexidine + Methyldopa Major
- Methyldopa + Pexidartinib Major
- Methyldopa + Pretomanid Major
- Methyldopa + Thioridazine Major
Frequently asked questions
Can I take Iron dextran complex with Methyldopa?
MediHelp rates the interaction as moderate. Iron dextran complex and Methyldopa 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. Oral iron salts reduce methyldopa absorption and may weaken blood pressure control. Parenteral iron dextran is not expected to affect gut absorption, so the interaction applies to oral iron only.
How serious is the interaction between Iron dextran complex and Methyldopa?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: If oral iron is used, separate it from methyldopa by at least 2 hours and monitor blood pressure. No separation is needed for injectable iron.
What other medicines interact with Methyldopa?
MediHelp also lists interactions of Methyldopa with, for example, Tranylcypromine, Iobenguane i, Lofexidine. The full list is on the Methyldopa page.
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