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 taken as an intravenous (IV) infusion given over 1 hour every 4 weeks. The recommended dose of Tysabri is 300 mg. Tysabri is only available in the US through doctors who are enrolled in the TOUCH Prescribing Program (TYSABRI Outreach: Unified Commitment to Health).