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.
Tools & Resources. FDA Lets MS Drug Tysabri Return. June 5, 2006 -- The FDA is letting the multiple sclerosis (MS)multiple sclerosis (MS) drug Tysabri back on the market under a restricted distribution program. The FDA first approved Tysabri in November 2004.