Drug interactions
Amitriptyline + Ziprasidone
Severity: Contraindicated
Amitriptyline and Ziprasidone: contraindicated 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 agents prolong the QT interval, so combined use increases the risk of torsades de pointes and sudden cardiac death. Ziprasidone labeling advises against combining it with other QT-prolonging drugs.
What this interaction means in plain words
Amitriptyline and Ziprasidone are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two.
Amitriptyline belongs to Central Nervous System; Ziprasidone belongs to Central Nervous System.
Why it happens
Additive QT interval prolongation.
What to do
Avoid the combination and choose an antipsychotic or antidepressant with less QT effect. If this cannot be avoided, correct electrolytes and monitor the ECG closely.
What to ask your pharmacist
- Is there an alternative to one of these two medicines for me?
- If both are essential, who is monitoring me and how often?
- Which symptoms mean I should stop and seek help straight away?
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Other interactions of Amitriptyline
- Amitriptyline + Isocarboxazid Contraindicated
- Amitriptyline + Methylene blue Contraindicated
- Amitriptyline + Phenelzine Contraindicated
- Amitriptyline + Pimozide Contraindicated
- Amitriptyline + Procarbazine Contraindicated
- Amitriptyline + Safinamide Contraindicated
Other interactions of Ziprasidone
- Amiodarone + Ziprasidone Contraindicated
- Arsenic trioxide + Ziprasidone Contraindicated
- Bedaquiline + Ziprasidone Contraindicated
- Chloroquine + Ziprasidone Contraindicated
- Citalopram + Ziprasidone Contraindicated
- Clarithromycin + Ziprasidone Contraindicated
Frequently asked questions
Can I take Amitriptyline with Ziprasidone?
MediHelp rates the interaction as contraindicated. Amitriptyline and Ziprasidone are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two. Both agents prolong the QT interval, so combined use increases the risk of torsades de pointes and sudden cardiac death. Ziprasidone labeling advises against combining it with other QT-prolonging drugs.
How serious is the interaction between Amitriptyline and Ziprasidone?
MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination and choose an antipsychotic or antidepressant with less QT effect. If this cannot be avoided, correct electrolytes and monitor the ECG closely.
What other medicines interact with Amitriptyline?
MediHelp also lists interactions of Amitriptyline with, for example, Isocarboxazid, Methylene blue, Phenelzine. The full list is on the Amitriptyline page.
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