Drug interactions
Dexamethasone-tobramycin + Erlotinib
Severity: Minor
Dexamethasone-tobramycin and Erlotinib: minor 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 weakly induce CYP3A4 and reduce erlotinib exposure. The effect is expected to be small and unlikely to matter with topical dexamethasone.
What this interaction means in plain words
Dexamethasone-tobramycin and Erlotinib have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Dexamethasone-tobramycin belongs to Anti Bacterial; Erlotinib belongs to Oncology.
Why it happens
Weak CYP3A4 induction by dexamethasone increases erlotinib metabolism.
What to do
No adjustment is needed; monitor tumor response if prolonged systemic dexamethasone is used.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Dexamethasone-tobramycin
Other interactions of Erlotinib
- Amobarbital + Erlotinib Major
- Apalutamide + Erlotinib Major
- Carbamazepine + Erlotinib Major
- Cobicistat + Erlotinib Major
- Darunavir + Erlotinib Major
- Dexlansoprazole + Erlotinib Major
Frequently asked questions
Can I take Dexamethasone-tobramycin with Erlotinib?
MediHelp rates the interaction as minor. Dexamethasone-tobramycin and Erlotinib have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Dexamethasone may weakly induce CYP3A4 and reduce erlotinib exposure. The effect is expected to be small and unlikely to matter with topical dexamethasone.
How serious is the interaction between Dexamethasone-tobramycin and Erlotinib?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No adjustment is needed; monitor tumor response if prolonged systemic dexamethasone is used.
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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