There are multiple studies listed in the postings below - this herb seems to be helpful for people who have schizophrenia. So be sure to scroll all the way down on this page.
"Our results suggest that Yokukansan has a beneficial effect on Neuropsychiatric Inventory (NPI) and on ADL scores and that Yokukansan seems to be a well-tolerated treatment."
and in this study immediately below:
Conclusions. The results of the present study indicate that TJ-54 showed a tendency of being superior to placebo in reduction PANSS scores in treatment-resistant schizophrenia, but the difference was not statistically significant. However, compared to the placebo group, TJ-54 group showed statistically significant improvements in the individual PANSS subscale scores.
Objectives. We aimed at evaluating both the efficacy and safety of TJ-54 (Yokukansan) in patients with treatment-resistant schizophrenia. This randomized, multicenter, double-blind, placebo-controlled study was conducted. Methods. One hundred and twenty antipsychotic-treated inpatients were included. Patients were randomized to adjuvant treatment with TJ-54 or placebo. During a 4-week follow-up, psychopathology was assessed using the Positive and Negative Syndrome Scale (PANSS). Results. TJ-54 showed a tendency of being superior to placebo in reduction total, positive, and general PANSS scores in treatment-resistant schizophrenia, but the difference was not statistically significant in both per-protocol set (PPS) and intention-to-treat (ITT). However, in PPS analysis, compared to the placebo group, the TJ-54 group showed statistically significant improvements in the individual PANSS subscale scores for lack of spontaneity and flow of conversation (TJ-54:-0.23 ± 0.08) ; placebo:-0.03 ± 0.08, P < 0.018 , ), tension (TJ-54: -0.42 ± 0.09 ; placebo: -0.18 ± 0.09, P < 0.045 , ), and poor impulse control (TJ-54: -0.39 ± 0.10 ; placebo: -0.07 ± 0.10, P < 0.037 , ).