Shares of Aradigm plunged, after the pharmaceutical company released mixed results for its inhaled antibiotic Pulmaquin.
Oil prices continued their upward climb Thursday, buoyed by Wednesday's landmark OPEC agreement.
The SEC has released correspondence between the agency and Valeant over concerns about its tax accounting and non-GAAP reporting measures.
U.S. stocks held mixed as a rally in crude oil failed to provide an across-the-board lift.
Will investors want to wait 12 to 18 months to see Allergan's deals pay dividends?
Valeant shares fell Wednesday on news that talks with Takeda to take over Valeant's Salix unit have broken down.
TheStreet's Adam Feuerstein answers reader questions about biotech stocks.
Stocks climbed as evidence of an economy on the mend overshadowed a slump in crude oil prices.