On July 14, 2020, Johnson and Johnson announced that the FDA has approved Tremfya® (guselkumab) for treatment of adult patients with active psoriatic arthritis (PsA), making it the first medicine in its class to be approved for the condition. PsA is a chronic, inflammatory disease of the joints and commonly results in swelling, pain, and stiffness of the joints and surrounding areas. Tremfya® is part of a class of medications known as selective interleukin (IL)-23 inhibitors, which help to limit the inflammation that causes symptoms. In clinical trials, Tremfya® was found to significantly improve signs and symptoms in joints, skin, and soft tissue in adult patients with PsA. Psoriasis is estimated to affect more than 8 million Americans and studies show that 10-30% of these patients will develop PsA.