Drug interactions
Bazedoxifene / conjugated estrogens + Fondaparinux
Severity: Major
Bazedoxifene / conjugated estrogens 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
Estrogens and bazedoxifene both increase venous thromboembolism risk, which works against fondaparinux given to treat or prevent clots. The combination is generally inappropriate in patients with active thrombosis.
What this interaction means in plain words
Bazedoxifene / conjugated estrogens 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: estrogen-induced prothrombotic changes versus factor Xa inhibition.
What to do
Avoid the estrogen combination in active or recent VTE and consider non-hormonal therapy. Reassess VTE risk regularly if continued.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Bazedoxifene / conjugated estrogens and Fondaparinux, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 14 days on the web. No card needed.
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 Bazedoxifene / conjugated estrogens with Fondaparinux?
MediHelp rates the interaction as major. Bazedoxifene / conjugated estrogens 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. Estrogens and bazedoxifene both increase venous thromboembolism risk, which works against fondaparinux given to treat or prevent clots. The combination is generally inappropriate in patients with active thrombosis.
How serious is the interaction between Bazedoxifene / conjugated estrogens 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 the estrogen combination in active or recent VTE and consider non-hormonal therapy. Reassess VTE risk regularly if continued.
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.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
