Drug interactions
Lofepramine + Ziprasidone
Severity: Major
Lofepramine and Ziprasidone: 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
Lofepramine is a tricyclic antidepressant with QT-prolonging and arrhythmogenic potential, especially in overdose or with other risk factors. With ziprasidone, the risk of QTc prolongation and ventricular arrhythmia is increased.
What this interaction means in plain words
Lofepramine and Ziprasidone 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 inhibition of cardiac potassium currents causing QT prolongation.
What to do
Avoid the combination if possible and choose an antidepressant with less QT effect. If it cannot be avoided, obtain baseline and follow-up ECGs and correct electrolytes.
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 Ziprasidone
- Amiodarone + Ziprasidone Contraindicated
- Amitriptyline + Ziprasidone Contraindicated
- Arsenic trioxide + Ziprasidone Contraindicated
- Bedaquiline + Ziprasidone Contraindicated
- Chloroquine + Ziprasidone Contraindicated
- Citalopram + Ziprasidone Contraindicated
Frequently asked questions
Can I take Lofepramine with Ziprasidone?
MediHelp rates the interaction as major. Lofepramine and Ziprasidone 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. Lofepramine is a tricyclic antidepressant with QT-prolonging and arrhythmogenic potential, especially in overdose or with other risk factors. With ziprasidone, the risk of QTc prolongation and ventricular arrhythmia is increased.
How serious is the interaction between Lofepramine and Ziprasidone?
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 if possible and choose an antidepressant with less QT effect. If it cannot be avoided, obtain baseline and follow-up ECGs and correct electrolytes.
What other medicines interact with Ziprasidone?
MediHelp also lists interactions of Ziprasidone with, for example, Amiodarone, Amitriptyline, Arsenic trioxide. The full list is on the Ziprasidone page.
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