Answer
It is sometimes intentionally co-prescribed to reduce adverse effects, but follow the methotrexate clinician's instructions.
Sources for this answer
- NHS Specialist Pharmacy ServiceNHS Specialist Pharmacy Service · NHS medicine guidance
- Folic acid Colonis 1mg/ml oral solution — 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.