Drug interactions
Magnesium supplement + Penicillamine
Severity: Moderate
Magnesium supplement and Penicillamine: 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 magnesium can bind penicillamine in the gut and reduce its absorption. This may weaken the therapeutic effect in Wilson disease, cystinuria or rheumatoid arthritis.
What this interaction means in plain words
Magnesium supplement and Penicillamine 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
Chelation of penicillamine by polyvalent cations in the gastrointestinal tract reduces absorption.
What to do
Give penicillamine at least 2 hours apart from magnesium products. Monitor clinical response or urinary copper or cystine as appropriate.
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 Penicillamine
- Gold sodium thiomalate + Penicillamine Major
- Aluminum hydroxide + Penicillamine Moderate
- Calcium carbonate + Penicillamine Moderate
- Calcium + Penicillamine Moderate
- Carbonyl iron + Penicillamine Moderate
- Copper + Penicillamine Moderate
Frequently asked questions
Can I take Magnesium supplement with Penicillamine?
MediHelp rates the interaction as moderate. Magnesium supplement and Penicillamine 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 magnesium can bind penicillamine in the gut and reduce its absorption. This may weaken the therapeutic effect in Wilson disease, cystinuria or rheumatoid arthritis.
How serious is the interaction between Magnesium supplement and Penicillamine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Give penicillamine at least 2 hours apart from magnesium products. Monitor clinical response or urinary copper or cystine as appropriate.
What other medicines interact with Penicillamine?
MediHelp also lists interactions of Penicillamine with, for example, Gold sodium thiomalate, Aluminum hydroxide, Calcium carbonate. The full list is on the Penicillamine page.
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