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Tesaro, Inc.

Company NameTesaro, Inc.
Stock SymbolTSRO

On January 12, 2018, Tesaro announced that it had updated the U.S. labeling for Varubi (rolapitant), indicated for the prevention of delayed nausea and vomiting associated with chemotherapy, after receiving reports of "[a]naphylaxis, anaphylactic shock and other serious hypersensitivity reactions . . . in the postmarketing setting, some requiring hospitalization."  The Company further disclosed that it "has issued a Dear Healthcare Professional (DHCP) letter." 

On this news, shares of Tesaro fell $3.73 or 5.4%, to close at $65.86 on January 16, 2018, thereby injuring investors.

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