Answer
The solution in a Dupixent (dupilumab) 300 mg pre-filled syringe should be clear to slightly opalescent, colourless to pale yellow, and free from visible particulates.
Sources for this answer
- Dupixent 300 mg solution for injection in pre-filled syringeSANOFI · emc · SmPC §3 Pharmaceutical form · Version 27Document updated
Sources checked