Drug interactions
Dexamethasone-tobramycin + Fexinidazole
Severity: Moderate
Dexamethasone-tobramycin and Fexinidazole: 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
Fexinidazole inhibits CYP3A4 and may raise dexamethasone concentrations, increasing corticosteroid adverse effects. With topical or ophthalmic dexamethasone-tobramycin the effect is likely small because systemic exposure is low.
What this interaction means in plain words
Dexamethasone-tobramycin and Fexinidazole 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.
Why it happens
Fexinidazole inhibits CYP3A4, reducing dexamethasone metabolism.
What to do
Monitor for corticosteroid excess if systemic dexamethasone is used with fexinidazole; no action is needed for minimal-absorption topical use.
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
Frequently asked questions
Can I take Dexamethasone-tobramycin with Fexinidazole?
MediHelp rates the interaction as moderate. Dexamethasone-tobramycin and Fexinidazole 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. Fexinidazole inhibits CYP3A4 and may raise dexamethasone concentrations, increasing corticosteroid adverse effects. With topical or ophthalmic dexamethasone-tobramycin the effect is likely small because systemic exposure is low.
How serious is the interaction between Dexamethasone-tobramycin and Fexinidazole?
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 for corticosteroid excess if systemic dexamethasone is used with fexinidazole; no action is needed for minimal-absorption topical use.
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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