1. RO 4-0403 (Taractan) produced a beneficial response in 7 of a group of 30 extremely chronic psychotic patients. Those patients who responded showed a decrease in agitation, appeared more friendly and expressed the subjective sensation of "feeling better." Undesirable side effects were observed in only 2 of the 30 patients treated. From these results it would appear that this compound can be safely and effectively used in acute psychiatric disorders.2. Trifluoperazine (Stelazine) is a potent drug that is effective in reducing the symptomatology in chronic psychotic patients. In this study more than half the patients who received trifluoperazine showed a desirable change of behavior during the study but side effects were noted in 40% of those treated. These side effects usually appeared at a high dosage and disappeared promptly after the administration of anti-Parkinsonian drugs.3. Since only 1 patient out of 30 showed a slight improvement while receiving a placebo, it is presumed that suggestion and attention were of minimal importance in producing the changes observed with the active compounds.Abstract Teaser