Drug interactions
Betamethasone + Warfarin
Severity: Moderate
Betamethasone and Warfarin: 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
Corticosteroids such as betamethasone may increase or decrease INR in patients on warfarin, and high doses can add gastrointestinal bleeding risk. The effect is unpredictable and dose related.
What this interaction means in plain words
Betamethasone and Warfarin 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.
Betamethasone belongs to Endocrine; Warfarin belongs to Cardiovascular.
Why it happens
Mechanism not well established; may involve altered clotting factor synthesis and mucosal irritation.
What to do
Monitor INR when starting, changing or stopping systemic betamethasone, particularly with high-dose or prolonged courses. Adjust warfarin dosing accordingly.
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 Warfarin
- Defibrotide + Warfarin Contraindicated
- Ketorolac + Warfarin Contraindicated
- Abciximab + Warfarin Major
- Acetylsalicylic acid + Warfarin Major
- Adagrasib + Warfarin Major
- Amiodarone + Warfarin Major
Other interactions of Betamethasone
Frequently asked questions
Can I take Betamethasone with Warfarin?
MediHelp rates the interaction as moderate. Betamethasone and Warfarin 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. Corticosteroids such as betamethasone may increase or decrease INR in patients on warfarin, and high doses can add gastrointestinal bleeding risk. The effect is unpredictable and dose related.
How serious is the interaction between Betamethasone and Warfarin?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor INR when starting, changing or stopping systemic betamethasone, particularly with high-dose or prolonged courses. Adjust warfarin dosing accordingly.
What other medicines interact with Warfarin?
MediHelp also lists interactions of Warfarin with, for example, Defibrotide, Ketorolac, Abciximab. The full list is on the Warfarin page.
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