Answer
It should be clear, colourless and water-like, without visible particles. Do not use it if its appearance has changed.
Sources for this answer
- Toujeo 300 units/ml SoloStar, solution for injection in a pre-filled pen — 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.