Answer
Yes. Viscotears Single Dose Unit is preservative-free, whereas Liquivisc is a multidose product containing benzalkonium chloride.
Sources for this answer
- Liquivisc — Current selected SmPCemc · Summary of Product Characteristics
- Viscotears Single Dose Unit 2.0mg/g Eye Gel — 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.