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.
Tysabri is supplied as a 300 mg vial designed for intravenous infusion. This concentrated solution that must be diluted prior to intravenous infusion. The recommended initial dose of the drug is a 300 mg intravenous infusion over one hour every four weeks. Tysabri should not be used with concomitant immunosuppressants or concomitant inhibitors of TNF-a.