Answer
Yes. It can prolong the QT interval and rarely cause a serious arrhythmia. Known long-QT syndrome and concurrent QT-prolonging medicines are contraindications.
Sources for this answer
- Escitalopram 5 mg film-coated tablets — 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.