Drug interactions
Dabrafenib + Dexamethasone
Severity: Moderate
Dabrafenib and Dexamethasone: 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
Dabrafenib is a CYP3A4 and CYP2C8 substrate and itself an inducer. Dexamethasone may lower dabrafenib exposure, and dabrafenib may in turn reduce dexamethasone levels, potentially reducing efficacy of both.
What this interaction means in plain words
Dabrafenib and Dexamethasone 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.
Dabrafenib belongs to Oncology; Dexamethasone belongs to Endocrine.
Why it happens
Dexamethasone induces CYP3A4 and dabrafenib induces CYP3A4, so each can accelerate the other's metabolism.
What to do
Monitor tumor response and adjust dexamethasone dose to clinical effect, for example when used for cerebral edema or antiemesis.
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 Dabrafenib
Frequently asked questions
Can I take Dabrafenib with Dexamethasone?
MediHelp rates the interaction as moderate. Dabrafenib and Dexamethasone 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. Dabrafenib is a CYP3A4 and CYP2C8 substrate and itself an inducer. Dexamethasone may lower dabrafenib exposure, and dabrafenib may in turn reduce dexamethasone levels, potentially reducing efficacy of both.
How serious is the interaction between Dabrafenib and Dexamethasone?
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 tumor response and adjust dexamethasone dose to clinical effect, for example when used for cerebral edema or antiemesis.
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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