Brand name: Geodon Generic name: Ziprasidone hydrochloride Why is Geodon prescribed? Geodon is used to treat schizophrenia and the manic episodes of bipolar disorder. Researchers believe it works by opposing the action of serotonin and dopamine, two of the brain's major chemical messengers. Because of its potentially serious side effects, Geodon is typically prescribed only after other medications have proved inadequate. Geodon may also be used for purposes other than those listed in this medication guide.