Biogen Idec Investigates Tysabri in Secondary-Progressive Multiple Sclerosis Patients
Biogen Idec is currently sponsoring a clinical trial evaluating its therapy Tysabri (natalizumab) in patients with secondary-progressive multiple sclerosis. Although relapse-remitting multiple sclerosis is more common and well-researched, the National Multiple Sclerosis Society estimates approximately half of relapse-remitting patients will transition to secondary-progressive within 19 years of diagnosis. The…