After its failed attempt to Buy Allergan, Pfzier bids over $5 billion for Anacor Pharmaceuticals.

Valeant execs testified before Congress yesterday, with exiting CEO Mike Pearson saying company's price hikes were "too aggressive."

Sprout says Valeant, who bought the drug in 2015 for $1 billion, failed in its duties to commercialize the pill.

Valeant, the troubled Canadian drug company, is shaking up exec roles following a string of questionable business practices.

Valeant CEO sends memo to employees one day after shares of the Canadian drug company plunged 51 percent.

Pfizer Inc. and Allergan Plc agreed to combine in a record $160 billion deal, creating a drugmaking behemoth called Pfizer Plc with products from Viagra to Botox and a low-cost tax base.

Buying Allergan, which is in Dublin, could let Pfizer relocate outside the U.S. for tax purposes, a transaction known as an inversion--and of course, Allergan has Botox and the Alzheimers drug Namenda.

Bristol-Myers Squibb Co.s immune cancer therapy Opdivo won approval for a broader population of patients.