Answer
Very rarely, anti-CD20 treatment has been associated with PML, a serious brain infection whose symptoms can resemble worsening MS.
Sources for this answer
- Ocrevus 920 mg solution for injection — Current selected SmPCemc · Summary of Product Characteristics
- OCREVUS 300 mg concentrate for solution for infusion — 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.