Drug interactions
Escitalopram + Protriptyline
Severity: Major
Escitalopram and Protriptyline: 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
Combining an SSRI with a tricyclic antidepressant can increase serotonergic effects and the risk of serotonin syndrome. Escitalopram may also modestly raise tricyclic levels via CYP2D6 inhibition, adding anticholinergic and cardiac effects.
What this interaction means in plain words
Escitalopram and Protriptyline 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.
Why it happens
Additive serotonin reuptake inhibition, with CYP2D6 inhibition by escitalopram raising protriptyline exposure.
What to do
Avoid unless specialist-supervised. If combined, use low doses, monitor for serotonin toxicity and ECG changes, and consider protriptyline levels.
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
Frequently asked questions
Can I take Escitalopram with Protriptyline?
MediHelp rates the interaction as major. Escitalopram and Protriptyline 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. Combining an SSRI with a tricyclic antidepressant can increase serotonergic effects and the risk of serotonin syndrome. Escitalopram may also modestly raise tricyclic levels via CYP2D6 inhibition, adding anticholinergic and cardiac effects.
How serious is the interaction between Escitalopram and Protriptyline?
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 unless specialist-supervised. If combined, use low doses, monitor for serotonin toxicity and ECG changes, and consider protriptyline levels.
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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