In 2012, a study of Men and women age 18–50 years who had a diagnosis of schizophrenia or schizophreniform psychosis
BACKGROUND: was a therapeutic-exploratory (phase II), double-blinded, monocenter, randomized, parallel-group, controlled clinical trial of cannabidiol vs amisulpride
You can read the full article here => https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3316151/