Ustekinumab determination kit  is an in vitro diagnostic test for the quantitative detection of free Ustekinumab in human serum or plasma specimen.

Ustekinumab is a humanized monoclonal antibody against interleukin-12 and interleukin-23. Ustekinumab is indicated for the treatment of moderate-to-severe plaque psoriasis, active psoriasis, and Crohn’s disease (requiring higher injectable doses). Clinical efficacy usually correlates with therapeutic antibody trough levels. Monitoring the drug level of Ustekinumab provides a reference for achieving the optimal treatment plan.