Drug interactions
Defibrotide + Fondaparinux
Severity: Contraindicated
Defibrotide and Fondaparinux: contraindicated 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
Defibrotide enhances fibrinolysis and has antithrombotic effects, so with fondaparinux the risk of serious bleeding is increased. Defibrotide labeling contraindicates concurrent systemic anticoagulant or fibrinolytic therapy.
What this interaction means in plain words
Defibrotide and Fondaparinux are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two.
Defibrotide belongs to Cardiovascular; Fondaparinux belongs to Cardiovascular.
Why it happens
Additive pharmacodynamic effects on hemostasis through factor Xa inhibition plus enhanced fibrinolysis.
What to do
Do not co-administer; hold fondaparinux during defibrotide treatment or use an alternative plan. Line maintenance or reopening of central lines is the usual exception.
What to ask your pharmacist
- Is there an alternative to one of these two medicines for me?
- If both are essential, who is monitoring me and how often?
- Which symptoms mean I should stop and seek help straight away?
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Other interactions of Fondaparinux
- Fondaparinux + Ketorolac Contraindicated
- Abciximab + Fondaparinux Major
- Aceclofenac + Fondaparinux Major
- Acetylsalicylic acid + Fondaparinux Major
- Alteplase + Fondaparinux Major
- Apixaban + Fondaparinux Major
Other interactions of Defibrotide
- Alteplase + Defibrotide Contraindicated
- Apixaban + Defibrotide Contraindicated
- Argatroban + Defibrotide Contraindicated
- Dabigatran etexilate + Defibrotide Contraindicated
- Dalteparin + Defibrotide Contraindicated
- Defibrotide + Edoxaban Contraindicated
Frequently asked questions
Can I take Defibrotide with Fondaparinux?
MediHelp rates the interaction as contraindicated. Defibrotide and Fondaparinux are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two. Defibrotide enhances fibrinolysis and has antithrombotic effects, so with fondaparinux the risk of serious bleeding is increased. Defibrotide labeling contraindicates concurrent systemic anticoagulant or fibrinolytic therapy.
How serious is the interaction between Defibrotide and Fondaparinux?
MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Do not co-administer; hold fondaparinux during defibrotide treatment or use an alternative plan. Line maintenance or reopening of central lines is the usual exception.
What other medicines interact with Fondaparinux?
MediHelp also lists interactions of Fondaparinux with, for example, Ketorolac, Abciximab, Aceclofenac. The full list is on the Fondaparinux page.
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