Quetiapine (branded as Seroquel, Xeroquel, Ketipinor), is an atypical antipsychotic approved for the treatment of schizophrenia, bipolar disorder, and in the XR version along with an SSRI to treat major depressive disorder. Annual sales are approximately $5.7 billion worldwide, with $2.9 billion in the United States. The U.S. patent, which was set to expire in 2011, received a pediatric exclusivity extension which pushed its expiration to March 26, 2012. The patent has already expired in Canada. There are now several generic versions of quetiapine, such as Quepin, Syquel and Ketipinor.
Contributions by Neitherday, Jmlk17, and Sandover.