26th February 2024

A 77-year-old woman presents to the rheumatologist for follow-up of her rheumatoid arthritis.

A 77-year-old woman presents to the rheumatologist for follow-up of her rheumatoid arthritis. She was first diagnosed in 2010 and since then has been on methotrexate. Recently her treatment regimen has been adjusted to also include leflunomide.

Select one option which correctly describes an element of the monitoring required when on leflunomide.