Answer
Yes. It can rarely prolong the QT interval and cause serious ventricular arrhythmias, particularly with cardiac risk factors or interacting medicines.
Sources for this answer
- Domperidone 1mg/ml Oral Suspension — 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.