Drug interactions
Dexamethasone-tobramycin + Osimertinib
Severity: Moderate
Dexamethasone-tobramycin and Osimertinib: 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 induce CYP3A4 and lower osimertinib concentrations, with potential loss of efficacy. The effect is smaller than with strong inducers. Dexamethasone is often used for symptom control in patients on osimertinib.
What this interaction means in plain words
Dexamethasone-tobramycin and Osimertinib 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; Osimertinib belongs to Oncology.
Why it happens
Weak-to-moderate CYP3A4 induction by dexamethasone increases osimertinib clearance.
What to do
Use the lowest effective dexamethasone dose and duration, and monitor disease response to osimertinib.
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 Osimertinib
Frequently asked questions
Can I take Dexamethasone-tobramycin with Osimertinib?
MediHelp rates the interaction as moderate. Dexamethasone-tobramycin and Osimertinib 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 induce CYP3A4 and lower osimertinib concentrations, with potential loss of efficacy. The effect is smaller than with strong inducers. Dexamethasone is often used for symptom control in patients on osimertinib.
How serious is the interaction between Dexamethasone-tobramycin and Osimertinib?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use the lowest effective dexamethasone dose and duration, and monitor disease response to osimertinib.
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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