Drug interactions
Dexamethasone-tobramycin + Ponatinib
Severity: Moderate
Dexamethasone-tobramycin and Ponatinib: 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
Ponatinib is metabolized partly by CYP3A4, and dexamethasone can induce this enzyme. Systemic dexamethasone may reduce ponatinib exposure and efficacy, although the effect is weaker than with strong inducers.
What this interaction means in plain words
Dexamethasone-tobramycin and Ponatinib 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; Ponatinib belongs to Oncology.
Why it happens
CYP3A4 induction by dexamethasone increases ponatinib metabolism.
What to do
Monitor hematologic and molecular response when systemic dexamethasone is prolonged. Consider an alternative to dexamethasone if response declines.
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 Ponatinib
Frequently asked questions
Can I take Dexamethasone-tobramycin with Ponatinib?
MediHelp rates the interaction as moderate. Dexamethasone-tobramycin and Ponatinib 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. Ponatinib is metabolized partly by CYP3A4, and dexamethasone can induce this enzyme. Systemic dexamethasone may reduce ponatinib exposure and efficacy, although the effect is weaker than with strong inducers.
How serious is the interaction between Dexamethasone-tobramycin and Ponatinib?
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 hematologic and molecular response when systemic dexamethasone is prolonged. Consider an alternative to dexamethasone if response declines.
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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