Abstract:Objective To investigate the clinical efficacy, safety and cognitive function of olanzapine, paliperidone sustained-release tablets and amisulpride in the treatment of first-episode schizophrenia. Methods The clinical data of 141 cases of first-episode schizophrenia in our hospital were retrospectively analyzed. The selected patients were divided into A group, B group and C group according to different treatment methods, 47 cases in each group. A was treated with paliperidone sustained-release tablets, B with olanzapine and C with amisulpride. Cognitive function scores, clinical symptoms scores, clinical efficacy and adverse reactions of each group were compared and analyzed. Results The scores of MMSE dimensions in A group were higher than those in B group and C group, with statistical significance (P?0.05); there was no significant difference in MMSE dimensions between B group and C group (P?>?0.05). After treatment, the PANSS scores of A group were lower than those of B group and C group, and the difference was statistically significant (P?0.05); there was no significant difference in the PANSS scores of B group and C group (P?>?0.05). After treatment, there was no significant difference in the total effective rate of each group (P?>?0.05). The incidence of adverse reactions in A group (8.51%) was lower than that in B group (27.66%) and C group (29.79%), and the difference was statistically significant (P?0.05), but there was no significant difference in the incidence of adverse reactions between B group and C group (P?>?0.05). Conclusions Three drugs can obtain ideal curative effect in the treatment of first-episode schizophrenia. paliperidone sustained-release tablets are better than olanzapine and amisulfapride in improving clinical symptoms and cognitive level. At the same time, paliperidone sustained-release tablets mainly pass through kidney metabolism, rarely through liver metabolism, and can be applied to patients with impaired liver function.