“…On the other hand, YKS is prescribed for neurosis, insomnia, and irritability in frailty. Many clinical trials have shown that YKS improved the behavioral and psychological symptoms of dementia, such as hallucination, delusion, agitation, and aggression (Iwasaki et al 2005, Mizukami et al 2009, Matsuda et al 2013, Monji et al 2009, Okahara et al 2010. Subsequently, a meta-analysis was performed to examine the effect of YKS on these symptoms (Matsuda et al 2013).…”