Drug interactions
Nortriptyline + Quetiapine
Severity: Major
Nortriptyline and Quetiapine: 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
Both drugs cause sedation and can prolong the QT interval, and both have anticholinergic and hypotensive effects. The combination raises the risk of arrhythmia, particularly with overdose, electrolyte disturbance or other QT-prolonging drugs.
What this interaction means in plain words
Nortriptyline and Quetiapine 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.
Nortriptyline belongs to Central Nervous System; Quetiapine belongs to Central Nervous System.
Why it happens
Additive QT prolongation, CNS depression and anticholinergic effects.
What to do
Obtain a baseline ECG and correct potassium and magnesium abnormalities. Monitor QTc and sedation, and avoid adding other QT-prolonging drugs.
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 Nortriptyline
- Disopyramide + Nortriptyline Contraindicated
- Dofetilide + Nortriptyline Contraindicated
- Dronedarone + Nortriptyline Contraindicated
- Ibutilide + Nortriptyline Contraindicated
- Isocarboxazid + Nortriptyline Contraindicated
- Methylene blue + Nortriptyline Contraindicated
Other interactions of Quetiapine
- Adagrasib + Quetiapine Major
- Amiodarone + Quetiapine Major
- Amisulpride + Quetiapine Major
- Amoxapine + Quetiapine Major
- Anagrelide + Quetiapine Major
- Apalutamide + Quetiapine Major
Frequently asked questions
Can I take Nortriptyline with Quetiapine?
MediHelp rates the interaction as major. Nortriptyline and Quetiapine 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. Both drugs cause sedation and can prolong the QT interval, and both have anticholinergic and hypotensive effects. The combination raises the risk of arrhythmia, particularly with overdose, electrolyte disturbance or other QT-prolonging drugs.
How serious is the interaction between Nortriptyline and Quetiapine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Obtain a baseline ECG and correct potassium and magnesium abnormalities. Monitor QTc and sedation, and avoid adding other QT-prolonging drugs.
What other medicines interact with Nortriptyline?
MediHelp also lists interactions of Nortriptyline with, for example, Disopyramide, Dofetilide, Dronedarone. The full list is on the Nortriptyline page.
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