Factors Associated with the Effectiveness of Intravenous Administration of Chlorpromazine for Delirium in Patients with Terminal Cancer

Pharmacologic Management of End-of-Life Delirium: Translating Evidence into Practice

End-of-life delirium affects a vast majority of patients before death. It is highly distressing and often associated with restlessness or agitation. Unlike delirium in other settings, it is considered irreversible, and non-pharmacologic measures may be less feasible. The objective of this review is to provide an in-depth discussion of the clinical trials on delirium in the palliative care setting, with a particular focus on studies investigating pharmacologic interventions for end-of-life delirium. To date, only six randomized trials have examined pharmacologic options in palliative care populations, and only two have focused on end-of-life delirium. These studies suggest that neuroleptics and benzodiazepines may be beneficial for the control of the terminal restlessness or agitation associated with end-of-life delirium. However, existing studies have significant methodologic limitations. Further studies are needed to confirm these findings and examine novel therapeutic options to manage this distressing syndrome.

Chlorpromazine's Potential Role in Palliating Distressing Symptoms Associated with Hyperactive Delirium in Patients at End of Life

Background: The hyperactive subtype of delirium is characterized by agitation, restlessness, delusions, and/or hallucinations, which commonly present near end of life (EoL). Symptom relief often requires the use of medications, such as chlorpromazine (CPZ), to reduce patient distress by inducing proportional sedation. Objective: The purpose of this study was to evaluate CPZ's potential role in managing the distress of hyperactive delirium in patients receiving EoL care. Methods: A retrospective observational study among hospitalized patients with advanced cancer at EoL between January 2020 to December 2021. Results: Sustained improvement in symptoms of delirium was seen in 80% of patients as identified in the palliative psychiatrist's progress notes. Meanwhile, 75% of patient's improvement was reported in nursing-driven Delirium Observation Screening Scale. Conclusion: This study elucidates that at doses of ∼100 mg/day, CPZ is potentially an effective medication for patients with advanced cancer, experiencing hyperactive delirium in their final week of life.

Chlorpromazine as Treatment for Refractory Agitation Associated with Pediatric Delirium

OBJECTIVE

Delirium and agitation can be devastating and prolong the length of hospitalization. As part of our continuous improvement efforts, we implemented the use of intermittent chlorpromazine therapy to target refractory agitation associated with hyperactive or mixed delirium (RAA-D). The purpose of this study was to evaluate the effectiveness of chlorpromazine on RAA-D and delirium symptoms as well as any adverse effects in critically ill children.

METHODS

Retrospective chart review was conducted for children admitted to the pediatric intensive care unit who were treated with chlorpromazine for RAA-D from March 2017 to January 2019. The primary end point was to determine differences in Cornell Assessment for Pediatric Delirium (CAPD) and State Behavioral Scale (SBS) scores 24 hours before and after chlorpromazine administration. The secondary end points were the 24-hour cumulative dosing of narcotic and sedative agents before and after chlorpromazine administration and adverse events associated with chlorpromazine use.

RESULTS

Twenty-six patients were treated with chlorpromazine for RAA-D; 16 (61.5%) were male with a median age of 14.5 months (IQR, 6–48). The mean CAPD (n = 24) and median SBS (n = 23) scores were significantly lower 24 hours after chlorpromazine use when compared to baseline scores, 12 vs 8.9 (p = 0.0021) and 1 vs −1, (p = 0.0005) respectively. No significant adverse effects were observed.

CONCLUSIONS

Chlorpromazine use in critically ill children with RAA-D was helpful for managing symptoms without adverse events. Further investigation is needed to evaluate the use of chlorpromazine to treat RAA-D to avoid long-term use of an antipsychotic.

Pharmacological and non-pharmacological treatment of delirium in an oncological hospital service: an integrative review

OBJECTIVES

to analyze the production of scientific articles about the pharmacological and non-pharmacological management of delirium in adult hospitalized cancer patients.

METHODS

integrative review whose sample was obtained from the databases Scopus, Cumulative Index to Nursing and Allied Health Literature, EMBASE, Web of Science, and from the portals Biblioteca Virtual em Saúde, and PubMed.

RESULTS

among the ten studies analyzed, 80% described exclusively the pharmacological management, especially with regard to the use of haloperidol; 20% mentioned, superficially, non-pharmacological interventions/actions (educational actions) associated to pharmacological management, and adjusting them could result in the diminution and control of psychomotor agitation, contributing for the safety and comfort of the patient.

CONCLUSIONS

there are few studies addressing pharmacological and non-pharmacological interventions/actions to manage delirium. As a result, it is essential to develop studies focused on increasing and advancing scientific knowledge with regard to the theme, especially in the national context.

Neuroleptic strategies for terminal agitation in patients with cancer and delirium at an acute palliative care unit: a single-centre, double-blind, parallel-group, randomised trial

BACKGROUND

The role of neuroleptics for terminal agitated delirium is controversial. We assessed the effect of three neuroleptic strategies on refractory agitation in patients with cancer with terminal delirium.

METHODS

In this single-centre, double-blind, parallel-group, randomised trial, patients with advanced cancer, aged at least 18 years, admitted to the palliative and supportive care unit at the University of Texas MD Anderson Cancer Center (Houston, TX, USA), with refractory agitation, despite low-dose haloperidol, were randomly assigned to receive intravenous haloperidol dose escalation at 2 mg every 4 h, neuroleptic rotation with chlorpromazine at 25 mg every 4 h, or combined haloperidol at 1 mg and chlorpromazine at 12·5 mg every 4 h, until death or discharge. Rescue doses identical to the scheduled doses were administered at inception, and then hourly as needed. Permuted block randomisation (block size six; 1:1:1) was done, stratified by baseline Richmond Agitation Sedation Scale (RASS) scores. Research staff, clinicians, patients, and caregivers were masked to group assignment. The primary outcome was change in RASS score from time 0 to 24 h. Comparisons among group were done by modified intention-to-treat analysis. This completed study is registered with ClinicalTrials.gov, NCT03021486.

FINDINGS

Between July 5, 2017, and July 1, 2019, 998 patients were screened for eligibility, with 68 being enrolled and randomly assigned to treatment; 45 received the masked study interventions (escalation n=15, rotation n=16, combination n=14). RASS score decreased significantly within 30 min and remained low at 24 h in the escalation group (n=10, mean RASS score change between 0 h and 24 h -3·6 [95% CI -5·0 to -2·2]), rotation group (n=11, -3·3 [-4·4 to -2·2]), and combination group (n=10, -3·0 [-4·6 to -1·4]), with no difference among groups (p=0·71). The most common serious toxicity was hypotension (escalation n=6 [40%], rotation n=5 [31%], combination n=3 [21%]); there were no treatment-related deaths.

INTERPRETATION

Our data provide preliminary evidence that the three strategies of neuroleptics might reduce agitation in patients with terminal agitation. These findings are in the context of the single-centre design, small sample size, and lack of a placebo-only group.

FUNDING

National Institute of Nursing Research.

Intravenous Chlorpromazine for the Short-Term Treatment of Insomnia in End-Stage Cancer Patients With Difficulty in Oral Administration

The objective of the study was to evaluate effectiveness and safety of intravenous chlorpromazine for the short-term treatment of insomnia in end-stage cancer patients. Insomnia occurs as one of distressing symptoms in 70% of end-stage cancer patients. End-stage cancer patients often have difficulty in oral administration because of disease progress. We retrospectively evaluated 30 end-stage cancer patients with difficulty in oral administration who received intravenous chlorpromazine for the short-term treatment of insomnia. A primary end point was sleep quality based on St. Mary's Hospital Sleep Questionnaire 3 days after the treatment. Improved sleep quality was observed on the day after the treatment and later (P < .001), and the effective rate mean was 0.63 (95% confidential interval: 0.45-0.81) 3 days after the treatment. Increased total sleep time and decreased sleep latency time were observed 3 days after the treatment (P < .001); however, no improvement in depth of sleep was achieved (P = .231). There was no adverse event except for two delirium cases. The study indicated that intravenous chlorpromazine can be applied safely and effectively for the short-term treatment of insomnia in end-stage cancer patients with difficulty in oral administration.