Drug interactions
Deferoxamine + Vitamin c
Severity: Major
Deferoxamine and Vitamin c: major 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
Vitamin C increases the amount of iron available for chelation by deferoxamine and can raise urinary iron excretion. In iron-overloaded patients, especially those with cardiac involvement, high-dose vitamin C has been linked to cardiac dysfunction, which can be serious.
What this interaction means in plain words
Deferoxamine and Vitamin c can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Deferoxamine belongs to Miscellaneous; Vitamin c belongs to Gastrointestinal Tract.
Why it happens
Ascorbic acid mobilizes tissue iron into a labile pool, which may increase iron-mediated myocardial toxicity while enhancing deferoxamine chelation.
What to do
Avoid vitamin C in patients with cardiac dysfunction receiving deferoxamine. If it is used, start it only after a month of regular chelation, keep doses low, and monitor cardiac function.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Vitamin c
Other interactions of Deferoxamine
Frequently asked questions
Can I take Deferoxamine with Vitamin c?
MediHelp rates the interaction as major. Deferoxamine and Vitamin c can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Vitamin C increases the amount of iron available for chelation by deferoxamine and can raise urinary iron excretion. In iron-overloaded patients, especially those with cardiac involvement, high-dose vitamin C has been linked to cardiac dysfunction, which can be serious.
How serious is the interaction between Deferoxamine and Vitamin c?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid vitamin C in patients with cardiac dysfunction receiving deferoxamine. If it is used, start it only after a month of regular chelation, keep doses low, and monitor cardiac function.
What other medicines interact with Vitamin c?
MediHelp also lists interactions of Vitamin c with, for example, Aluminum hydroxide, Dextroamphetamine transdermal, Aspirin / citric acid / sodium bicarbonate. The full list is on the Vitamin c page.
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