Answer
The symbol means it is being monitored particularly closely so new safety information can be identified quickly; it does not mean the medicine is unsafe.
Sources for this answer
- Evkeeza 150 mg/ml concentrate for solution for infusion — 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.