Drug interactions
Estropipate + Fondaparinux
Severity: Major
Estropipate and Fondaparinux: 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
Estropipate, an oral estrogen, increases thrombotic risk and may counteract the benefit of fondaparinux in patients being treated for or protected against clots.
What this interaction means in plain words
Estropipate and Fondaparinux 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.
Why it happens
Pharmacodynamic opposition: estrogens promote coagulation while fondaparinux inhibits factor Xa.
What to do
Avoid estrogen therapy during active thrombosis and consider non-hormonal options. Reassess VTE risk before continuing.
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 Fondaparinux
- Defibrotide + Fondaparinux Contraindicated
- Fondaparinux + Ketorolac Contraindicated
- Abciximab + Fondaparinux Major
- Aceclofenac + Fondaparinux Major
- Acetylsalicylic acid + Fondaparinux Major
- Alteplase + Fondaparinux Major
Frequently asked questions
Can I take Estropipate with Fondaparinux?
MediHelp rates the interaction as major. Estropipate and Fondaparinux 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. Estropipate, an oral estrogen, increases thrombotic risk and may counteract the benefit of fondaparinux in patients being treated for or protected against clots.
How serious is the interaction between Estropipate and Fondaparinux?
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 estrogen therapy during active thrombosis and consider non-hormonal options. Reassess VTE risk before continuing.
What other medicines interact with Fondaparinux?
MediHelp also lists interactions of Fondaparinux with, for example, Defibrotide, Ketorolac, Abciximab. The full list is on the Fondaparinux page.
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