The most searched-for drug on for the past two months has been Abilify, which treats the symptoms of psychotic conditions such as schizophrenia and bipolar disorder. Initially approved in November 2002, more than 12.5 million prescriptions have been written for Abilify in the United States as of June 2007.

Expect those numbers to continue climbing. Last week, the FDA approved the drug as an add-on treatment for adults with major depressive disorder. The drug is to be used in conjunction with commonly prescribed depression drugs, including the SSRIs Lexapro, Prozac, Paxil CR, and Zoloft.