Answer
Fenfluramine can cause heart-valve disease or pulmonary arterial hypertension, so echocardiograms are required before, during and after treatment.
Sources for this answer
- Fintepla 2.2 mg/mL oral solution — 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.