Clinical Challenges in Patients with First Episode Psychosis and Cannabis Use: Mini-Review and a Case Study.

The influence of cannabis use on the occurrence, clinical course and the treatment of the first psychotic episode (FEP) is well documented. However, the exact link is still not clearly established. The aim of this article is to review and report the noticed increase in the number of hospitalizations of young people with a clinical appearance of severe psychotic decompensation following cannabis consumption and to show the clinical challenges in treatment of the FEP. The case study describes the clinical course of a five selected patients with a diagnosis of the FEP and positive tetrahydrocannabinol (THC) urine test who were hospitalized in a similar pattern of events. They all have a history of cannabis consumption for at least 6 years in continuity and were presented with severe psychomotor agitation, disorganisation, confusion and aggression at admission. Although the chosen drug to treat all patients was atypical antipsychotic and benzodiazepines, the course of the disorder and the clinical response to therapy were noticeably different in each patient. The clinical presentation of FEP in cannabis users can be atypical and highly unpredictable from mild psychotic symptoms to severe substance intoxication delirium. In clinical practice clinicians treating new onset psychosis need to be watchful for cannabis and synthetic cannabinoids induced psychosis. Pharmacotherapeutic interventions include prompt and adequate use of the benzodiazepine, second-generation antipsychotic, and mood-stabilizers. Further research in the pharmacotherapy of cannabis-induced psychosis is required.

Efficacy of Center for Integrative Psychiatry Multimodal Early Intervention Services in Early-Phase Psychosis on Hospital Readmission.

BACKGROUND: Growing body of evidence has opened new opportunities to enhance treatment outcomes during early-phase psychosis (EPP). The objective of this study was to evaluate the effect of the Centre for integrative psychiatry (CIP) multimodal Early Intervention Services (EIS) on time to relapse in the patients with early-phase psychosis (EPP) during 12 and 24 month period. SUBJECTS AND METHODS: We performed a retrospective cohort study on the sample of 454 EPP patients (duration of the diagnosed disorder ≤5 years) admitted to Psychiatric Hospital "Sveti Ivan", Zagreb Croatia, from January 2, 2015, to December 5, 2018, for the acute treatment of EPP. The end of follow up was March 5, 2019. The primary outcome was the time to rehospitalization because of relapse during the 12 months from the hospital discharge. Independent variable was the EIS. RESULTS: We analyzed 454 EPP patients, 260 in EIS group and 194 in no EIS group. After the adjustment for twenty possible confounding factors using the Cox proportional hazard regression, patients who received EIS had significantly and clinically relevantly lower hazard for rehospitalization because of relapse during the first 12 months (HR=0.39; CI95% 0.21-0.61; p<0.001), and during the first 24 months from the hospital discharge (HR=0.56; CI95% 0.39-0.80; p=0.003; sequential Holm-Bonferroni corrected pcorr=0.004). CONCLUSIONS: Our study indicated efficacy of the CIP multimodal EIS in patients with EPP demonstrated through the time to the hospital readmission because of relapse during the 12 and 24 months from the hospital discharge. These results strongly support the need for implementation of multimodal EIS in all patients with EPP.

Early Intervention Services for Early-Phase Psychosis - Centre for integrative psychiatry in Psychiatric Hospital "Sveti Ivan", Croatia.

BACKGROUND: There is a growing body of evidence suggesting that early and effective management in the critical early years of schizophrenia can improve long-term outcomes. The objective of this study was to evaluate time to relapse of the patients with early-phase psychosis treated in the Centre for integrative psychiatry (CIP). SUBJECT AND METHODS: We performed a retrospective cohort study on the sample of 373 early-phase psychosis patients admitted to Psychiatric Hospital "Sveti Ivan", Zagreb Croatia: from January 1, 2015 to December 31, 2017. The primary outcome was time to relapse. RESULTS: Patients who were admitted to group psychotherapeutic program after the end of acute treatment had 70% lower hazard for relapse (HR=0.30; 95% CI 0.16-0.58). Patients who were included first in the psychotherapeutic program and then treated and controlled in the daily hospital had 74% lower hazard for relapse (HR=0.26; 95% CI 0.10-0.67). CONCLUSIONS: In early-phase psychosis, integrative early intervention service has relevant beneficial effects compare to treatment as usual. These results justified the implementation of multimodal early intervention services in treatment of patients with early-phase psychosis.