The macroenvironment consists of forces that originate outside of an organization and generally cannot be altered by actions of the organization. In other words, a firm may be influenced by changes within this element of its environment, but cannot itself influence the environment.
What is Tysabri? Tysabri (natalizumab) is a prescription medication for adult patients with relapsing forms of multiple Sclerosis. It is shown in clinical studies to slow the worsening of disability caused by MS and decrease the number of flare-ups, or relapses. Tysabri may also improve mental function in some patients.
Available by prescription only, Tysabri is used to prevent worsening of relapses and disabilities caused by multiple sclerosis, and to treat and prevent symptoms of Crohn's disease. It comes in the form of an intravenous (IV) injection that is administered by a healthcare provider once every four weeks.