Drug interactions
Chlorpromazine + Glasdegib
Severity: Major
Chlorpromazine and Glasdegib: major interaction.
Last updated Sources: US FDA label
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
Glasdegib and chlorpromazine can both prolong the QT interval, so the combination raises the risk of ventricular arrhythmia including torsade de pointes.
What this interaction means in plain words
Chlorpromazine and Glasdegib 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.
Chlorpromazine belongs to Central Nervous System; Glasdegib belongs to Oncology.
Why it happens
Additive QT prolongation through effects on cardiac repolarization.
What to do
Avoid the combination where an alternative exists. If it must be used, monitor ECG and electrolytes and correct potassium and magnesium abnormalities.
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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References
Other interactions of Chlorpromazine
- Chlorpromazine + Dofetilide Contraindicated
- Chlorpromazine + Dronedarone Contraindicated
- Chlorpromazine + Droperidol Contraindicated
- Chlorpromazine + Ibutilide Contraindicated
- Chlorpromazine + Metrizamide Contraindicated
- Chlorpromazine + Panobinostat Contraindicated
Other interactions of Glasdegib
- Amiodarone + Glasdegib Major
- Amisulpride + Glasdegib Major
- Amobarbital + Glasdegib Major
- Anagrelide + Glasdegib Major
- Apalutamide + Glasdegib Major
- Asenapine + Glasdegib Major
Frequently asked questions
Can I take Chlorpromazine with Glasdegib?
MediHelp rates the interaction as major. Chlorpromazine and Glasdegib 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. Glasdegib and chlorpromazine can both prolong the QT interval, so the combination raises the risk of ventricular arrhythmia including torsade de pointes.
How serious is the interaction between Chlorpromazine and Glasdegib?
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 where an alternative exists. If it must be used, monitor ECG and electrolytes and correct potassium and magnesium abnormalities.
What other medicines interact with Chlorpromazine?
MediHelp also lists interactions of Chlorpromazine with, for example, Dofetilide, Dronedarone, Droperidol. The full list is on the Chlorpromazine page.
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