Dexamethasone Injection and Boceprevir: Interaction Details
AI-assisted, pharmacist-reviewed · Source data updated Aug 8, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Boceprevir
No brand names on recordDexamethasone Injection
How we grade severity & evidence
Severity levels
- Contraindicated: These should generally not be used together.
- Major: Potentially serious — often needs a change or close monitoring.
- Moderate: Can be significant — usually manageable with monitoring.
- Minor: Usually limited clinical impact.
Evidence grades
- Established: Well documented — supported by controlled studies or strong clinical data.
- Probable: Good supporting evidence, though not definitively proven.
- Suspected: Some evidence suggests this interaction, but it is not well established.
- Possible: Limited or conflicting evidence; the interaction may occur.
- Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.
Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.
What happens
Reduced boceprevir plasma concentrations and increased dexamethasone plasma concentrations
Interaction Deep Dive
Avoid concomitant use of boceprevir and dexamethasone if possible, as this may lead to decreased boceprevir plasma concentrations and a loss of virologic activity2. Additionally, coadministration with boceprevir and dexamethasone, may lead to increased plasma concentrations of dexamethasone and increase the risk for systemic corticosteroid side effects 1. If coadministration is necessary, use cautiously 2 and monitor patients for systemic corticosteroid side effects 1.
Why it happens (mechanism)
Induction of CYP3A4/5-mediated metabolism of boceprevir by dexamethasone; inhibition of CYP3A4-mediated metabolism of dexamethasone by boceprevir
Common questions
Can I take Dexamethasone Injection and Boceprevir together?
Reduced boceprevir plasma concentrations and increased dexamethasone plasma concentrations Always confirm with your pharmacist or prescriber before making any change.
How serious is the Dexamethasone Injection and Boceprevir interaction?
It is rated major. Potentially serious — often needs a change or close monitoring.
How quickly could this interaction happen?
The documented onset is "unspecified". The timing of this interaction is not well characterized.
How strong is the evidence for this interaction?
The evidence is graded "theoretical". Predicted from the drugs' pharmacology; not yet confirmed in people.
Questions for your pharmacist
- Does my dose of Dexamethasone Injection or Boceprevir need adjusting while I take them together?
- What symptoms should prompt me to call you or my prescriber right away?
- Does the timing of my doses matter for this combination?
- Is there a safer alternative to one of these medications for me?
References (2)
- Product Information: DECADRON(R) oral tablets, dexamethasone oral tablets. Merck Sharp & Dohme Corp (per FDA), Whitehouse Station, NJ, 2019. DailyMed
- Product Information: VICTRELIS(TM) oral capsules, boceprevir oral capsules. Merck & Co, Inc, Whitehouse Station, NJ, 2011.
Keep reading about Boceprevir
Keep reading about Dexamethasone Injection
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