Cowen Questions Sales Growth of Biogen Idec's MS Drug Tecfidera SmallCap Network AVONEX® (interferon beta-1a), TYSABRI® (natalizumab), and RITUXAN® (rituximab) are Biogen's other primary drugs in the MS indication. These three brought in the vast majority of the company's $1.4 B in quarterly revenues ($736 million, $275 million, ... |