High Rate of Discontinuation during Long-Acting Injectable Antipsychotic Treatment in Patients with Psychotic Disorders

Long-Acting Injectable Antipsychotics in the Geriatric Population: A longitudinal Study

OBJECTIVE

This study compares demographic, clinical characteristics, and outcomes in older adults on long-acting injectable antipsychotics (LAI-AP) vs. oral antipsychotics (PO-AP).

DESIGN

This observational study with a retrospective cohort utilized the electronic medical record's search engine to review charts of geriatric patients on LAI-AP for a two-year period. A convenience sample on PO-AP formed the comparison group. LAI-AP patients were subcategorized into discontinuation and continuation groups.

SETTING

Conducted at an urban, psychiatric outpatient clinic, using charts from October 2020 to 2022.

PARTICIPANTS

Patients at least 60 years-old with psychotic or mood disorders on antipsychotics for at least 3-months during the study period.

MEASUREMENTS

Demographic and clinical variables, including diagnosis, medication type, side effects, medical comorbidities, neurocognitive status, and secondary medications, were collected for both PO-AP and LAI-AP groups. Outcome variables included missed appointments, psychiatric and medical hospitalizations, and emergency room visits. Correlates of discontinuation of LAI-AP were also assessed.

RESULTS

LAI-AP had a higher proportion than PO-AP of primary psychotic disorders (87.8% vs. 64.3%). During the study, PO-AP had higher rates of missed appointments (median 18% vs. 13% for LAI-AP) and psychiatric admissions (mean 0.019/month vs. 0.006/month for LAI-AP;); Female sex was a risk factor for discontinuation of LAI-AP (86.7% of discontinuation group vs. 55.2% of continuation group).

CONCLUSIONS

The LAI-AP group showed reduced hospitalizations, better treatment engagement, and comparable tolerability to PO-AP. Preliminary data suggests gender may influence LAI-AP discontinuation rates. This study adds to the sparse literature investigating the efficacy and tolerability of LAI-AP in geriatric patients.

The effect of early or late initiation of long-acting antipsychotics on the caregiver burden in schizophrenia

The effective treatment in the early stages of schizophrenia is of critical importance to improve the prognosis. Schizophrenia affects patients' relatives too. The effects of early or late initiation of long-acting injectable antipsychotics (LAI-APs) on the patient have been shown, yet their effects on the caregiver are still unknown. We aimed to determine how the time of initiation of LAI-APs affects the caregiver burden by comparing the patients who were started on LAI-APs in the first 5 years of diagnosis and those who were started at a later period. Patients were classified as 'early-LAI' and 'late-LAI' according to the time of initiation of a LAI-AP. Their caregivers were also classified as the same way, as 'caregiver-early' and 'caregiver-late' and were compared in terms of caregiver burden. The quality of life, depression, anxiety, and caregiver burden scores of the caregiver-late group were significantly worse. The time of initiation of LAI-APs and the functioning levels of the patients were found to be determinant factors for the caregiver burden. This is the first study to investigate the effects of LAI-AP's initiation time on the caregivers to our knowledge. The use of LAI-APs in the early stages is associated with better outcomes for the caregiver.

Sociodemographic and clinical factors associated with prescription of first- versus second-generation long-acting antipsychotics in incarcerated adult males

Information on patterns of prescription of long-acting injection (LAI) antipsychotics among people who are incarcerated is lacking. Therefore, we aimed to evaluate prescribing rates for first-generation antipsychotic (FGA)-LAI versus second-generation antipsychotic (SGA)-LAI and to identify the factors associated with the prescription of one of the two classes of LAI. A cross-sectional study was conducted among incarcerated adult males hosted in Monza detention center between January 2013 and April 2023. Socio-demographic and clinical data were retrospectively collected. Descriptive and univariate statistics as well as logistic regression analyses were performed. Data were available for 135 consecutive incarcerated adult males with different mental disorders who received a LAI as part of their treatment. 75.6% of our sample was treated with FGA-LAIs, with haloperidol as the most commonly prescribed drug, followed by zuclopentixol and aripiprazole. Diagnosis of bipolar disorder and concomitant administration of antidepressants were statistically significant predictors of SGA-LAI prescription. Some patients' characteristics may influence prescription patterns in prison. Further longitudinal studies with larger samples should confirm these findings.

Neutrophil-Lymphocyte Ratio Values in Schizophrenia: A Comparison between Oral and Long-Acting Antipsychotic Therapies

BACKGROUND

Schizophrenia is a mental disorder affecting approximately 0.32% of the global population, according to the World Health Organization. Antipsychotic medications are used to treat this condition by inhibiting D2 dopamine and 5HT2 serotonin receptors. The selection of the appropriate mode of delivery for these drugs is based on factors such as patient adherence, clinical presentation, and patient preferences. However, additional drivers of treatment selection are required in clinical practice. Mounting evidence suggests that neuroinflammation plays a crucial role in the pathogenesis of schizophrenia. NLR, a cost-effective biomarker of inflammation, has increased in several psychiatric conditions and may represent a valid method for studying the inflammatory stage in schizophrenia, relapse, and the first episode of psychosis. The aim of this study is to evaluate whether there are any variations in NLR values between patients given oral antipsychotics and those given long-acting antipsychotics.

METHODS

The study included 50 individuals with schizophrenia, either acute or in the follow-up phase. NLR was obtained by calculating the ratio of absolute neutrophil count (cells/μL) and absolute lymphocyte count (cells/μL).

RESULTS

Patients on long-acting antipsychotics exhibited significantly lower mean NLR scores (1.5 ± 0.7) compared to those on oral antipsychotics (2.2 ± 1.3) (p < 0.05).

CONCLUSIONS

NLR appears promising as a neuroinflammatory biomarker. This study reveals significantly lower NLR values in patients on long-acting antipsychotics, which may signify reduced systemic inflammation and improved adherence.

Long-Acting Injectable Second-Generation Antipsychotics in Seriously Ill Patients with Schizophrenia: Doses, Plasma Levels, and Treatment Outcomes

This research studies the dose-plasma level (PL) relationship of second-generation antipsychotics, together with the treatment outcomes achieved, in seriously ill people with schizophrenia. An observational, prospective, one-year follow-up study was carried out with patients (N = 68) with severe schizophrenia treated with paliperidone three-month (PP3M) or aripiprazole one-month (ARIM). Participants were divided into standard-dose or high-dose groups. PLs were divided into "standard PL" and "high PL" (above the therapeutic reference range, TRR) groups. The dose/PL relationship, and severity, hospitalizations, tolerability, compliance, and their relationship with doses and PLs were evaluated. There was no clear linear relationship between ARIM or PP3M doses and the PLs achieved. In half of the subjects, standard doses reached PLs above the TRR. The improvements in clinical outcomes (decrease in clinical severity and relapses) were related to high PLs, without worse treatment tolerability or adherence. All participants remained in the study, regardless of dose or PL. Clinical severity and hospitalizations decreased significantly more in those patients with high PLs. Considering the non-linear dose-PL relationship of ARIM and PP3M in people with severe schizophrenia, PLs above the TRR are linked to better treatment outcomes, without worse tolerability. The need in a notable number of cases for high doses to reach those effective PLs is highlighted.

Novel pharmacotherapy targeting the positive symptoms of schizophrenia

INTRODUCTION

The severity of positive symptoms in schizophrenia is associated with poor prognosis. About one-third of schizophrenia patients partially respond to treatment with available antipsychotics. The purpose of the present manuscript is to provide an updated overview of novel pharmacotherapy targeting positive symptoms in schizophrenia.

AREAS COVERED

A comprehensive research on the main database sources (PubMed, PsychINFO, Isi Web of Knowledge, MEDLINE, and EMBASE) was performed to obtain original articles published till 31st January 2023 about new pharmacological strategies for the treatment of positive symptoms in schizophrenia.

EXPERT OPINION

The most promising compounds include: lamotrigine, pro-cognitive-compounds (donepezil - in the short term, idazoxan and piracetam) and drugs acting partially or totally outside the Central Nervous System (CNS) (anti-inflammatory drugs: celecoxib, methotrexate; cardiovascular compounds: L-theanine, mononitrate isosorbide, propentofylline, sodium nitroprusside; metabolic regulators: diazoxide, allopurinol; others: bexarotene, raloxifene [in women]). The effectiveness of the latter compounds indicates that other biological systems, such as immunity or metabolism can be object of future research to identify pharmacological targets for positive symptoms of schizophrenia. Mirtazapine could be useful for treating negative symptoms without increasing the risk of a worsening of delusions/hallucinations. Nevertheless, the lack of replication of studies prevents to draw definitive conclusions and future studies are needed to confirm the findings presented in this overview.