Drug interactions
Dexamethasone-tobramycin + Irinotecan liposomal
Severity: Moderate
Dexamethasone-tobramycin and Irinotecan liposomal: 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 may induce CYP3A4 and lower exposure to irinotecan and its active metabolite. This could reduce antitumor efficacy, although dexamethasone is often used as antiemetic premedication.
What this interaction means in plain words
Dexamethasone-tobramycin and Irinotecan liposomal 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
Dexamethasone induces CYP3A4, which metabolizes irinotecan.
What to do
Limit dexamethasone to the antiemetic dose needed and monitor for therapeutic response and toxicity. Avoid prolonged steroid courses where possible.
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 Irinotecan liposomal?
MediHelp rates the interaction as moderate. Dexamethasone-tobramycin and Irinotecan liposomal 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 may induce CYP3A4 and lower exposure to irinotecan and its active metabolite. This could reduce antitumor efficacy, although dexamethasone is often used as antiemetic premedication.
How serious is the interaction between Dexamethasone-tobramycin and Irinotecan liposomal?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Limit dexamethasone to the antiemetic dose needed and monitor for therapeutic response and toxicity. Avoid prolonged steroid courses where possible.
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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