Haloperidol and Ziprasidone: Drug Interaction Guide
Quick answer: This is a major interaction — avoid combining Haloperidol and Ziprasidone unless specifically directed by your doctor.
How Haloperidol interacts with Ziprasidone
Both agents prolong the QT interval via hERG potassium channel blockade; additive effect substantially increases risk of torsades de pointes.
What you should do
Avoid combination. If both required, obtain baseline and repeat ECG, correct electrolytes (K, Mg), and avoid other QT-prolonging drugs.
Key facts
Severity
Major — avoid combination
Mechanism
Both agents prolong the QT interval via hERG potassium channel blockade; additive effect substantially increases risk of...
Action
Avoid combination. If both required, obtain baseline and repeat ECG, correct electrolytes (K, Mg), and avoid other QT-pr...
Frequently asked questions
Can I take Haloperidol and Ziprasidone together?
No — this combination should generally be avoided. Avoid combination. If both required, obtain baseline and repeat ECG, correct electrolytes (K, Mg), and avoid other QT-prolonging drugs.
What is the severity of this interaction?
The interaction between Haloperidol and Ziprasidone is classified as Major — avoid combination. Both agents prolong the QT interval via hERG potassium channel blockade; additive effect substantially increases risk of torsades de pointes.
What should I do if I'm prescribed both?
Avoid combination. If both required, obtain baseline and repeat ECG, correct electrolytes (K, Mg), and avoid other QT-prolonging drugs. Always consult your prescribing clinician — do not stop or change medications without medical guidance.
Last reviewed: by iMedic Medical Editorial Team. Our editorial process.