Answer
Haloperidol can prolong the QT interval and rarely cause serious ventricular arrhythmias. Risk is higher with cardiac disease, electrolyte disturbance, interacting medicines or injectable administration.
Sources for this answer
- Haloperidol Injection BP 5mg/ml — Current selected SmPCemc · Summary of Product Characteristics
- UK GovernmentUK Government · Reputable Web
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.