Drug interactions
Dexamethasone-tobramycin + Rivaroxaban
Severity: Moderate
Dexamethasone-tobramycin and Rivaroxaban: 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
Dexamethasone is a weak-to-moderate CYP3A4 inducer and may modestly lower rivaroxaban concentrations, potentially reducing anticoagulant protection. The effect is generally smaller than that of combined strong P-gp and CYP3A4 inducers. Systemic corticosteroids can also add to bleeding risk through gastric mucosal injury.
What this interaction means in plain words
Dexamethasone-tobramycin and Rivaroxaban 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.
Dexamethasone-tobramycin belongs to Anti Bacterial; Rivaroxaban belongs to Cardiovascular.
Why it happens
Dexamethasone induces CYP3A4 and possibly P-gp, increasing rivaroxaban clearance.
What to do
Monitor for signs of thrombosis or reduced anticoagulant effect during prolonged dexamethasone courses, and watch for GI bleeding. Reassess the anticoagulant choice if therapy is long term.
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 Dexamethasone-tobramycin
Other interactions of Rivaroxaban
- Defibrotide + Rivaroxaban Contraindicated
- Ketoconazole + Rivaroxaban Contraindicated
- Ketorolac + Rivaroxaban Contraindicated
- Abciximab + Rivaroxaban Major
- Acalabrutinib + Rivaroxaban Major
- Acetylsalicylic acid + Rivaroxaban Major
Frequently asked questions
Can I take Dexamethasone-tobramycin with Rivaroxaban?
MediHelp rates the interaction as moderate. Dexamethasone-tobramycin and Rivaroxaban 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. Dexamethasone is a weak-to-moderate CYP3A4 inducer and may modestly lower rivaroxaban concentrations, potentially reducing anticoagulant protection. The effect is generally smaller than that of combined strong P-gp and CYP3A4 inducers. Systemic corticosteroids can also add to bleeding risk through gastric mucosal injury.
How serious is the interaction between Dexamethasone-tobramycin and Rivaroxaban?
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 for signs of thrombosis or reduced anticoagulant effect during prolonged dexamethasone courses, and watch for GI bleeding. Reassess the anticoagulant choice if therapy is long term.
What other medicines interact with Dexamethasone-tobramycin?
MediHelp also lists interactions of Dexamethasone-tobramycin with, for example, Capreomycin, Carboplatin, Ciprofloxacin. The full list is on the Dexamethasone-tobramycin page.
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