Drug interactions
Dabrafenib + Deflazacort
Severity: Major
Dabrafenib and Deflazacort: 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
Dabrafenib induces CYP3A4 and can substantially reduce exposure to deflazacort's active metabolite. This may lead to loss of corticosteroid effect.
What this interaction means in plain words
Dabrafenib and Deflazacort 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.
Dabrafenib belongs to Oncology; Deflazacort belongs to Miscellaneous.
Why it happens
Dabrafenib induces CYP3A4, accelerating clearance of deflazacort's active metabolite.
What to do
Avoid the combination where possible, as deflazacort labeling advises against moderate or strong CYP3A4 inducers. If unavoidable, monitor for reduced efficacy and consider an alternative corticosteroid regimen.
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?
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Other interactions of Deflazacort
- Adenovirus types 4 and 7 live + Deflazacort Contraindicated
- Bcg vaccine live + Deflazacort Contraindicated
- Deflazacort + Influenza virus vaccine quadrivalent intranasal Contraindicated
- Deflazacort + Measles mumps and rubella vaccine Contraindicated
- Deflazacort + Measles mumps and rubella vaccine live Contraindicated
- Deflazacort + Measles mumps rubella and varicella vaccine live Contraindicated
Other interactions of Dabrafenib
Frequently asked questions
Can I take Dabrafenib with Deflazacort?
MediHelp rates the interaction as major. Dabrafenib and Deflazacort 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. Dabrafenib induces CYP3A4 and can substantially reduce exposure to deflazacort's active metabolite. This may lead to loss of corticosteroid effect.
How serious is the interaction between Dabrafenib and Deflazacort?
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 combination where possible, as deflazacort labeling advises against moderate or strong CYP3A4 inducers. If unavoidable, monitor for reduced efficacy and consider an alternative corticosteroid regimen.
What other medicines interact with Deflazacort?
MediHelp also lists interactions of Deflazacort with, for example, Adenovirus types 4 and 7 live, Bcg vaccine live, Influenza virus vaccine quadrivalent intranasal. The full list is on the Deflazacort page.
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