Schizophrenia and other psychotic disorders are serious mental illnesses and require complex therapy, in which pharmacists are involved. The theoretical part of the thesis is devoted to the knowledge of the basic characteristics of schizophrenic illness and the possibilities of therapy, which consist of pharmacological measures and psychosocial interventions, which also include education of the patient and his family. The practical part focuses on the role of pharmacists who, through their advice and care in pharmacies, help patients to improve their quality of life and minimise the side effects of antipsychotic treatment.