Drug interactions
Dexamethasone-tobramycin + Iloperidone
Severity: Moderate
Dexamethasone-tobramycin and Iloperidone: 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 iloperidone exposure, which could reduce antipsychotic effect. Iloperidone is a time-dependent CYP3A inhibitor and could raise dexamethasone exposure, although the clinical effect of that is probably small.
What this interaction means in plain words
Dexamethasone-tobramycin and Iloperidone 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-tobramycin belongs to Anti Bacterial; Iloperidone belongs to Central Nervous System.
Why it happens
Dexamethasone induces CYP3A4 (iloperidone is also metabolized by CYP3A4), while iloperidone weakly inhibits CYP3A4, so the effects on each drug's exposure run in opposite directions.
What to do
Monitor psychiatric response to iloperidone during and after prolonged dexamethasone courses and adjust the dose if efficacy falls. Watch for corticosteroid adverse effects during extended co-therapy.
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 Iloperidone
- Iloperidone + Thioridazine Contraindicated
- Alfuzosin + Iloperidone Major
- Amiodarone + Iloperidone Major
- Amisulpride + Iloperidone Major
- Amitriptyline + Iloperidone Major
- Anagrelide + Iloperidone Major
Frequently asked questions
Can I take Dexamethasone-tobramycin with Iloperidone?
MediHelp rates the interaction as moderate. Dexamethasone-tobramycin and Iloperidone 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 iloperidone exposure, which could reduce antipsychotic effect. Iloperidone is a time-dependent CYP3A inhibitor and could raise dexamethasone exposure, although the clinical effect of that is probably small.
How serious is the interaction between Dexamethasone-tobramycin and Iloperidone?
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 psychiatric response to iloperidone during and after prolonged dexamethasone courses and adjust the dose if efficacy falls. Watch for corticosteroid adverse effects during extended co-therapy.
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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