AstraZeneca's Seroquel gets FDA approval

It has also asked European regulators to approve the drug's use for the maintenance treatment of bipolar I disorder.

AstraZeneca sued Teva, the world's biggest generic drug maker, in 2005 to block a cheaper form of Seroquel. It sued Sandoz, the world's second biggest generic drug company, last year when it applied to sell Seroquel copies in four different doses.