Drug interactions
Chlorpromazine + Escitalopram
Severity: Major
Chlorpromazine and Escitalopram: major interaction.
Last updated Sources: UK SmPC
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
Escitalopram and chlorpromazine each prolong the QT interval in a dose-related way. Together they raise the risk of torsades de pointes, particularly at higher doses or with other risk factors.
What this interaction means in plain words
Chlorpromazine and Escitalopram 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; Escitalopram belongs to Central Nervous System.
Why it happens
Additive QT prolongation by blockade of cardiac potassium channels; chlorpromazine may also modestly raise SSRI exposure via CYP2D6 inhibition.
What to do
Avoid if possible or keep escitalopram at the lowest effective dose (max 20 mg/day, lower in older adults). Monitor ECG and electrolytes and consider an alternative antidepressant.
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 Escitalopram
- Cisapride + Escitalopram Contraindicated
- Citalopram + Escitalopram Contraindicated
- Escitalopram + Isocarboxazid Contraindicated
- Escitalopram + Methylene blue Contraindicated
- Escitalopram + Phenelzine Contraindicated
- Escitalopram + Pimozide Contraindicated
Other interactions of Chlorpromazine
- Chlorpromazine + Dofetilide Contraindicated
- Chlorpromazine + Dronedarone Contraindicated
- Chlorpromazine + Droperidol Contraindicated
- Chlorpromazine + Ibutilide Contraindicated
- Chlorpromazine + Metrizamide Contraindicated
- Chlorpromazine + Panobinostat Contraindicated
Frequently asked questions
Can I take Chlorpromazine with Escitalopram?
MediHelp rates the interaction as major. Chlorpromazine and Escitalopram 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. Escitalopram and chlorpromazine each prolong the QT interval in a dose-related way. Together they raise the risk of torsades de pointes, particularly at higher doses or with other risk factors.
How serious is the interaction between Chlorpromazine and Escitalopram?
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 if possible or keep escitalopram at the lowest effective dose (max 20 mg/day, lower in older adults). Monitor ECG and electrolytes and consider an alternative antidepressant.
What other medicines interact with Escitalopram?
MediHelp also lists interactions of Escitalopram with, for example, Cisapride, Citalopram, Isocarboxazid. The full list is on the Escitalopram page.
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