Drug interactions
Dexamethasone + Valbenazine
Severity: Moderate
Dexamethasone and Valbenazine: 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 may lower valbenazine and its active metabolite concentrations, reducing efficacy for tardive dyskinesia. Significant effects are more likely with prolonged dexamethasone use.
What this interaction means in plain words
Dexamethasone and Valbenazine 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 belongs to Endocrine; Valbenazine belongs to Central Nervous System.
Why it happens
Dexamethasone induces CYP3A4, which metabolizes valbenazine.
What to do
Avoid prolonged dexamethasone where possible, or monitor for loss of dyskinesia control. A valbenazine dose adjustment may be needed with sustained dosing.
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
- Bcg vaccine live + Dexamethasone Contraindicated
- Dexamethasone + Mifepristone Contraindicated
- Dexamethasone + Rilpivirine Contraindicated
- Dexamethasone + Smallpox vaccine live Contraindicated
- Dexamethasone + Varicella virus vaccine live Contraindicated
- Dexamethasone + Yellow fever vaccine Contraindicated
Other interactions of Valbenazine
- Deutetrabenazine + Valbenazine Contraindicated
- Tranylcypromine + Valbenazine Contraindicated
- Amiodarone + Valbenazine Major
- Amisulpride + Valbenazine Major
- Apalutamide + Valbenazine Major
- Carbamazepine + Valbenazine Major
Frequently asked questions
Can I take Dexamethasone with Valbenazine?
MediHelp rates the interaction as moderate. Dexamethasone and Valbenazine 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 may lower valbenazine and its active metabolite concentrations, reducing efficacy for tardive dyskinesia. Significant effects are more likely with prolonged dexamethasone use.
How serious is the interaction between Dexamethasone and Valbenazine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid prolonged dexamethasone where possible, or monitor for loss of dyskinesia control. A valbenazine dose adjustment may be needed with sustained dosing.
What other medicines interact with Dexamethasone?
MediHelp also lists interactions of Dexamethasone with, for example, Bcg vaccine live, Mifepristone, Rilpivirine. The full list is on the Dexamethasone page.
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