uestion: Has the patient had a past history of being nonresponsive to an adequate trial [defined as 8 weeks of no response or a partial response that plateaued at an unsatisfactory level] of any standard, typical neuroleptic, while during the trial demonstrating definite neuroleptic-induced parkinsonism?

• Yes - the history is quite certain: the patient had a poor response in the past
• No, or the history is less than certain that such an adequate trial ever occurred