Which laboratory tests are most important to monitor during etanercept therapy for rheumatoid arthritis?

Which laboratory tests are most important to monitor during etanercept therapy for rheumatoid arthritis?

• A. White blood cell counts and platelet counts
• B. Liver enzyme levels
• C. Hemoglobin and hematocrit
• D. Serum glucose

Answer: (A)

Etanercept dampens the immune response by inhibiting TNF, so the main safety concern is infection and related hematologic issues. The most important labs to monitor are white blood cell counts and platelets. Regular CBC with differential helps catch leukopenia or neutropenia, which can impair infection defense, and thrombocytopenia, which can raise bleeding risk. Baseline measures and periodic follow-up allow early detection and management if counts drop, guiding decisions about continuing, adjusting, or stopping therapy. Liver enzymes and glucose are not the primary safety signals for this class of drug, and while anemia can occur, it’s not the best single indicator of safety during TNF inhibitor therapy.

Etanercept dampens the immune response by inhibiting TNF, so the main safety concern is infection and related hematologic issues. The most important labs to monitor are white blood cell counts and platelets. Regular CBC with differential helps catch leukopenia or neutropenia, which can impair infection defense, and thrombocytopenia, which can raise bleeding risk. Baseline measures and periodic follow-up allow early detection and management if counts drop, guiding decisions about continuing, adjusting, or stopping therapy. Liver enzymes and glucose are not the primary safety signals for this class of drug, and while anemia can occur, it’s not the best single indicator of safety during TNF inhibitor therapy.