FDA Rejects Under-the-skin Tysabri for Relapsing MS
The U.S. Food and Drug Administration (FDA) has rejected Biogen‘s request for approval of under-the-skin administration of Tysabri (natalizumab) as a treatment for relapsing forms of multiple sclerosis (MS). “This response from the FDA does not affect the intravenous administration of Tysabri, a well-established high-efficacy treatment with a…