Drug interactions
Dexamethasone-tobramycin + Pimozide
Severity: Moderate
Dexamethasone-tobramycin and Pimozide: 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
Pimozide is metabolized by CYP3A4 and CYP2D6, so dexamethasone induction could lower its levels and reduce efficacy. Systemic corticosteroids can also cause hypokalemia, which adds to the QT risk of pimozide.
What this interaction means in plain words
Dexamethasone-tobramycin and Pimozide 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; Pimozide belongs to Central Nervous System.
Why it happens
CYP3A4 induction by dexamethasone lowers pimozide exposure, while corticosteroid-induced hypokalemia may add to QT prolongation risk.
What to do
With systemic dexamethasone, monitor potassium and ECG, and watch for loss of symptom control. Correct electrolyte disturbances promptly.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Dexamethasone-tobramycin and Pimozide, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
Other interactions of Dexamethasone-tobramycin
Other interactions of Pimozide
- Adagrasib + Pimozide Contraindicated
- Amiodarone + Pimozide Contraindicated
- Amisulpride + Pimozide Contraindicated
- Amitriptyline + Pimozide Contraindicated
- Amoxapine + Pimozide Contraindicated
- Anagrelide + Pimozide Contraindicated
Frequently asked questions
Can I take Dexamethasone-tobramycin with Pimozide?
MediHelp rates the interaction as moderate. Dexamethasone-tobramycin and Pimozide 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. Pimozide is metabolized by CYP3A4 and CYP2D6, so dexamethasone induction could lower its levels and reduce efficacy. Systemic corticosteroids can also cause hypokalemia, which adds to the QT risk of pimozide.
How serious is the interaction between Dexamethasone-tobramycin and Pimozide?
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 systemic dexamethasone, monitor potassium and ECG, and watch for loss of symptom control. Correct electrolyte disturbances promptly.
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.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
