Drug interactions
Penicillamine + Selenium
Severity: Moderate
Penicillamine and Selenium: 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 selenium products may bind penicillamine in the gut and reduce its absorption, which may weaken its therapeutic effect. The effect is related to chelation by polyvalent minerals.
What this interaction means in plain words
Penicillamine and Selenium 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.
Penicillamine belongs to Musculoskeletal; Selenium belongs to Gastrointestinal Tract.
Why it happens
Chelation of penicillamine by selenium-containing supplements in the gastrointestinal tract reduces absorption.
What to do
Give penicillamine on an empty stomach and separate it from selenium supplements by at least 2 hours. Monitor clinical response.
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
Other interactions of Selenium
- Alendronate + Selenium Moderate
- Eltrombopag + Selenium Moderate
- Ibandronate + Selenium Moderate
- Risedronate + Selenium Moderate
- Baloxavir marboxil + Selenium Minor
- Bictegravir + Selenium Minor
Frequently asked questions
Can I take Penicillamine with Selenium?
MediHelp rates the interaction as moderate. Penicillamine and Selenium 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 selenium products may bind penicillamine in the gut and reduce its absorption, which may weaken its therapeutic effect. The effect is related to chelation by polyvalent minerals.
How serious is the interaction between Penicillamine and Selenium?
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 on an empty stomach and separate it from selenium supplements by at least 2 hours. Monitor clinical response.
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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