Drug interactions
Dexamethasone-tobramycin + Fentanyl intranasal
Severity: Moderate
Dexamethasone-tobramycin and Fentanyl intranasal: 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 can induce CYP3A4 and lower fentanyl levels, causing reduced analgesia or withdrawal. When the inducer is stopped, fentanyl exposure may rise and cause respiratory depression.
What this interaction means in plain words
Dexamethasone-tobramycin and Fentanyl intranasal 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, increasing fentanyl metabolism.
What to do
With prolonged systemic dexamethasone, monitor analgesia and withdrawal, and titrate fentanyl. After stopping dexamethasone, monitor for sedation and respiratory depression and reduce the dose if needed.
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 Fentanyl intranasal?
MediHelp rates the interaction as moderate. Dexamethasone-tobramycin and Fentanyl intranasal 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 can induce CYP3A4 and lower fentanyl levels, causing reduced analgesia or withdrawal. When the inducer is stopped, fentanyl exposure may rise and cause respiratory depression.
How serious is the interaction between Dexamethasone-tobramycin and Fentanyl intranasal?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: With prolonged systemic dexamethasone, monitor analgesia and withdrawal, and titrate fentanyl. After stopping dexamethasone, monitor for sedation and respiratory depression and reduce the dose if needed.
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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