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Biogen/AbbVie MS Drug Zinbryta Approved; Faces Crowded Market, Liver Concerns

Executive Summary

Biogen Inc. and AbbVie Inc. may have won the FDA's approval to market Zinbryta (daclizumab) as a treatment for multiple sclerosis, but the firms are facing significant barriers in marketing the drug, which is entering an already crowded field and coming to the marketplace with a black-box warning about serious adverse liver risks, limiting its sales potential.

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