Kevzara (sarilumab) is a prescription medication used for the treatment of adults with moderate to severe rheumatoid arthritis (RA) who have not responded adequately to one or more disease-modifying antirheumatic drugs (DMARDs). It is a type of drug known as an interleukin-6 (IL-6) receptor antagonist, which works by blocking the activity of IL-6, a protein in the body that plays a key role in the inflammatory process associated with rheumatoid arthritis. By inhibiting this pathway, Kevzara helps reduce inflammation, pain, and joint damage in individuals with RA. It is administered through subcutaneous injection and is often used in combination with other DMARDs to improve patient outcomes.