Drug interactions
Dexamethasone-tobramycin + Finasteride
Severity: Minor
Dexamethasone-tobramycin and Finasteride: 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 induce CYP3A4 and modestly lower finasteride exposure. The clinical effect is unlikely to be meaningful, particularly with short or topical courses.
What this interaction means in plain words
Dexamethasone-tobramycin and Finasteride 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; Finasteride belongs to Genitourinary.
Why it happens
Dexamethasone is a weak-to-moderate CYP3A4 inducer that can increase finasteride metabolism.
What to do
No routine action is needed; reassess response to finasteride if prolonged systemic dexamethasone is given.
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 Finasteride
- Finasteride + Levoketoconazole Moderate
- Finasteride + Nefazodone Moderate
- Finasteride + Rifampin Moderate
- Finasteride + St john's wort Moderate
- Amobarbital + Finasteride Minor
- Aprepitant + Finasteride Minor
Frequently asked questions
Can I take Dexamethasone-tobramycin with Finasteride?
MediHelp rates the interaction as minor. Dexamethasone-tobramycin and Finasteride 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 induce CYP3A4 and modestly lower finasteride exposure. The clinical effect is unlikely to be meaningful, particularly with short or topical courses.
How serious is the interaction between Dexamethasone-tobramycin and Finasteride?
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 action is needed; reassess response to finasteride if prolonged systemic dexamethasone is given.
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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