Answer
Dimethyl fumarate can reduce lymphocytes and other white cells, increasing concern about opportunistic infection and PML. Tests also help identify liver or kidney adverse effects.
Sources for this answer
- Dimethyl Fumarate Mylan 120 mg Gastro-resistant Hard Capsules — Current selected SmPCemc · Summary of Product Characteristics
- Skilarence 30 mg gastro-resistant tablets — Current selected SmPCemc · Summary of Product Characteristics