Ziprasidone (marketed as Geodon, Zeldox by Pfizer and Zipwell by Actavis) was the fifth atypical antipsychotic to gain approval (February 2001) in the United States. It is approved by the U.S. Food and Drug Administration (FDA) for the treatment of schizophrenia, and acute mania and mixed states associated with bipolar disorder. Its intramuscular injection form is approved for acute agitation in schizophrenic patients for whom treatment with just ziprasidone is appropriate. Ziprasidone is also used off-label for depression, bipolar maintenance, and PTSD.