An adult patient with schizophrenia is brought in for an evaluation in anticipation of involuntary commitment. Past records show that they have been hospitalized six times over the past year. The patient has been tried on haloperidol (Haldol) and several second-generation antipsychotics, including risperidone, aripiprazole, quetiapine, and olanzapine. He did not respond to a trial of depot risperidone and haldol decanoate. Which of the following would be an appropriate medication to trial next?
1) Clozapine (Clozaril)
2) Risperidone (Risperdal)
3) Thioridazine (Mellaril)
4) Chlorpromazine (Thorazine)