Drug interactions
Gilteritinib + Hydroxyzine
Severity: Major
Gilteritinib and Hydroxyzine: major 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
Gilteritinib can prolong the QT interval and hydroxyzine has similar effects. Together they raise the risk of torsades de pointes, which matters in leukemia patients who often have electrolyte disturbances or other QT-prolonging drugs.
What this interaction means in plain words
Gilteritinib and Hydroxyzine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Gilteritinib belongs to Oncology; Hydroxyzine belongs to Respiratory.
Why it happens
Additive blockade of cardiac potassium channels leading to delayed repolarization.
What to do
Avoid the combination if an alternative exists. If used together, monitor the ECG and keep potassium and magnesium within normal limits.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Hydroxyzine
- Droperidol + Hydroxyzine Contraindicated
- Hydroxyzine + Pimozide Contraindicated
- Hydroxyzine + Thioridazine Contraindicated
- Hydroxyzine + Vandetanib Contraindicated
- Alfentanil + Hydroxyzine Major
- Amiodarone + Hydroxyzine Major
Other interactions of Gilteritinib
- Gilteritinib + Pimozide Contraindicated
- Amiodarone + Gilteritinib Major
- Amisulpride + Gilteritinib Major
- Amitriptyline + Gilteritinib Major
- Anagrelide + Gilteritinib Major
- Apalutamide + Gilteritinib Major
Frequently asked questions
Can I take Gilteritinib with Hydroxyzine?
MediHelp rates the interaction as major. Gilteritinib and Hydroxyzine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Gilteritinib can prolong the QT interval and hydroxyzine has similar effects. Together they raise the risk of torsades de pointes, which matters in leukemia patients who often have electrolyte disturbances or other QT-prolonging drugs.
How serious is the interaction between Gilteritinib and Hydroxyzine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination if an alternative exists. If used together, monitor the ECG and keep potassium and magnesium within normal limits.
What other medicines interact with Hydroxyzine?
MediHelp also lists interactions of Hydroxyzine with, for example, Droperidol, Pimozide, Thioridazine. The full list is on the Hydroxyzine page.
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