Answer
Selpercatinib can prolong the QT interval and increase susceptibility to abnormal heart rhythms, particularly when electrolytes are low or other QT-prolonging medicines are used.
Sources for this answer
- Retsevmo 40mg and 80mg film-coated tablets — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.