Drug interactions
Dexamethasone-tobramycin + Vincristine
Severity: Minor
Dexamethasone-tobramycin and Vincristine: 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 is a weak-to-moderate inducer of CYP3A4 and may modestly lower vincristine exposure. The effect is small and usually not clinically important, and the topical ophthalmic combination product adds little systemic dexamethasone.
What this interaction means in plain words
Dexamethasone-tobramycin and Vincristine 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; Vincristine belongs to Oncology.
Why it happens
Dexamethasone may weakly induce CYP3A4, which metabolizes vincristine.
What to do
No routine change is needed; watch for reduced vincristine response if systemic dexamethasone is given at high doses for a prolonged period.
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 Vincristine
- Adenovirus types 4 and 7 live + Vincristine Contraindicated
- Apalutamide + Vincristine Major
- Atazanavir + Vincristine Major
- Ceritinib + Vincristine Major
- Chloramphenicol + Vincristine Major
- Clarithromycin + Vincristine Major
Frequently asked questions
Can I take Dexamethasone-tobramycin with Vincristine?
MediHelp rates the interaction as minor. Dexamethasone-tobramycin and Vincristine 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 is a weak-to-moderate inducer of CYP3A4 and may modestly lower vincristine exposure. The effect is small and usually not clinically important, and the topical ophthalmic combination product adds little systemic dexamethasone.
How serious is the interaction between Dexamethasone-tobramycin and Vincristine?
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 routine change is needed; watch for reduced vincristine response if systemic dexamethasone is given at high doses for a prolonged period.
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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