Talmapimod is a p38 mitogen-activated protein (MAP) kinase inhibitor. Talmapimod reduced human myeloma cell growth in vivo both at early and advanced phases of the disease in mouse xenograft models. Talmapimod that blocks tumor necrosis factor-α, interleukin-1β, and cyclooxygenase-2 synthesis in patients with active rheumatoid arthritis (RA)