Drug interactions
Bexarotene + Dexamethasone-tobramycin
Severity: Moderate
Bexarotene and Dexamethasone-tobramycin: 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 is a CYP3A4 inducer and may lower bexarotene concentrations, which are cleared through CYP3A4. This could reduce antineoplastic effect. With topical ophthalmic use systemic exposure is low, so the effect is mainly relevant to systemic dosing.
What this interaction means in plain words
Bexarotene and Dexamethasone-tobramycin 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.
Bexarotene belongs to Oncology; Dexamethasone-tobramycin belongs to Anti Bacterial.
Why it happens
Dexamethasone induces CYP3A4, increasing the metabolism of bexarotene.
What to do
If systemic dexamethasone is given for prolonged periods, monitor response to bexarotene and lipid and thyroid parameters, and consider dose review if efficacy falls.
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 Bexarotene
- Bexarotene + Gemfibrozil Major
- Bexarotene + Lorlatinib Major
- Alogliptin-pioglitazone + Bexarotene Moderate
- Amobarbital + Bexarotene Moderate
- Aprepitant + Bexarotene Moderate
- Axitinib + Bexarotene Moderate
Frequently asked questions
Can I take Bexarotene with Dexamethasone-tobramycin?
MediHelp rates the interaction as moderate. Bexarotene and Dexamethasone-tobramycin 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 is a CYP3A4 inducer and may lower bexarotene concentrations, which are cleared through CYP3A4. This could reduce antineoplastic effect. With topical ophthalmic use systemic exposure is low, so the effect is mainly relevant to systemic dosing.
How serious is the interaction between Bexarotene and Dexamethasone-tobramycin?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: If systemic dexamethasone is given for prolonged periods, monitor response to bexarotene and lipid and thyroid parameters, and consider dose review if efficacy falls.
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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