Kesimpta is a prescription medication specifically approved for the treatment of relapsing forms of multiple sclerosis (MS) in adults. It is a monoclonal antibody that targets B-cells, which are believed to play a critical role in the progression of MS. By binding to the CD20 protein on these cells, Kesimpta decreases their activity, helping to reduce inflammation and prevent the immune system from attacking the nerves in the brain and spinal cord. This process helps to slow the progression of MS and reduce the frequency of relapses.