Antipsychotic medications and the elderly: effects on cognition and implications for use

Trends in the use of psychotropics in older people with dementia: interrupted time series of Finnish clinical guidelines of behavioural and psychological symptoms of dementia

BACKGROUND

Up to 90% of people with dementia experience behavioural and psychological symptoms of dementia (BPSD) as part of their illness. Psychotropics are not recommended as the first-line treatment of BPSD because older people are more prone to adverse reactions. In this study, we evaluate the impact of the Finnish clinical guidelines of BPSD (published in 2017) on psychotropic use in people with dementia.

METHODS

This study is based on Finnish Prescription Register data from 2009 to 2020. The data included all community-dwelling Finnish people aged ≥65 and who had anti-dementia medication purchases (n = 217,778). We used three-phased interrupted time series design to evaluate the changes in levels and trends of monthly (n = 144) psychotropic user rates compared with the predicted trends. In addition, we evaluated the changes in levels and trends of monthly new psychotropic user rates.

RESULTS

The level of monthly psychotropic user rate decreased non-significantly during the intervention period (β -0.057, P = 0.853), and during the post-intervention period, there was an increase in the level (β 0.443, P = 0.091) and slope (β 0.199, P = 0.198), but not statistically significant. The level of monthly new psychotropic user rate (β -0.009, P = 0.949) during the intervention period and the level (β 0.044, P = 0.714) and slope (β 0.021, P = 0.705) during the post-intervention period were almost unchanged.

CONCLUSIONS

Results may indicate possible challenges in deprescribing and better adherence to the guidelines at the beginning of BPSD treatment. Further research into the barriers to implement BPSD guidelines and the availability of non-pharmacological treatments is needed.

A scoping review of perceptions from healthcare professionals on antipsychotic prescribing practices in acute care settings

BACKGROUND

Antipsychotic medications are frequently prescribed in acute care for clinical indications other than primary psychiatric disorders such as delirium. Unfortunately, they are commonly continued at hospital discharge and at follow-ups thereafter. The objective of this scoping review was to characterize antipsychotic medication prescribing practices, to describe healthcare professional perceptions on antipsychotic prescribing and deprescribing practices, and to report on antipsychotic deprescribing strategies within acute care.

METHODS

We searched MEDLINE, EMBASE, PsycINFO, CINAHL, and Web of Science databases from inception date to July 3, 2021 for published primary research studies reporting on antipsychotic medication prescribing and deprescribing practices, and perceptions on those practices within acute care. We included all study designs excluding protocols, editorials, opinion pieces, and systematic or scoping reviews. Two reviewers screened and abstracted data independently and in duplicate. The protocol was registered on Open Science Framework prior to data abstraction (10.17605/OSF.IO/W635Z).

RESULTS

Of 4528 studies screened, we included 80 studies. Healthcare professionals across all acute care settings (intensive care, inpatient, emergency department) perceived prescribing haloperidol (n = 36/36, 100%) most frequently, while measured prescribing practices reported common quetiapine prescribing (n = 26/36, 76%). Indications for antipsychotic prescribing were delirium (n = 48/69, 70%) and agitation (n = 20/69, 29%). Quetiapine (n = 18/18, 100%) was most frequently prescribed at hospital discharge. Three studies reported in-hospital antipsychotic deprescribing strategies focused on pharmacist-driven deprescribing authority, handoff tools, and educational sessions.

CONCLUSIONS

Perceived antipsychotic prescribing practices differed from measured prescribing practices in acute care settings. Few in-hospital deprescribing strategies were described. Ongoing evaluation of antipsychotic deprescribing strategies are needed to evaluate their efficacy and risk.

Clonazepam tops the list of potentially inappropriate psychotropic (PIP) medications in older adults with psychiatric illness: A cross-sectional study based on Beers criteria 2019 vs STOPP criteria 2015

BACKGROUND

In older adults, polypharmacy and potentially inappropriate psychotropic (PIP) medication use are prominent prescription challenges. However, there is limited information available on the use of PIP medication in older adults having psychiatry illness.

OBJECTIVE

To find out the most commonly prescribed PIP in tertiary care hospitals of developing countries with respect to Beers criteria 2019 and Screening Tool of Older Persons' Potentially Inappropriate Prescriptions (STOPP) and predictors of PIP.

METHODS

A cross-sectional analysis of 456 patients of either sex with a median age of 65 years visiting the outpatient department of psychiatry was performed at the tertiary care hospital of North India with respect to Beers criteria 2019 and STOPP criteria 2015. Bivariate logistic regression was used to figure out the predictors of PIP medication.

RESULTS

Results of the study reflects a staggering number of older adults, (more than 91 % and 73 %) out of total 456 patients were prescribed with at least one PIP medication as per Beers criteria and STOPP criteria, respectively. Long-acting benzodiazepine like clonazepam, chlordiazepoxide were identified as one of the most commonly prescribed PIP medications with respect to the both set of criteria. Further analysis revealed that polypharmacy (≥5 medications with odds Ratio (OR) 17.33, 95% Confidence Interval (CI) 1.42-210.66, P-0.025) as the sole important predictor for PIP medication.

CONCLUSION

According to the Beers criterion and the STOPP criteria, the use of PIP medicine is very prevalent among older adults with psychiatric illness. The Beers criteria dramatically diagnose more PIP medication than STOPP criteria.

Leading 20 drug-drug interactions, polypharmacy, and analysis of the nature of risk factors due to QT interval prolonging drug use and potentially inappropriate psychotropic use in elderly psychiatry outpatients

BACKGROUND

Psychotropic medications extend corrected QT (QTc) period in the electrocardiogram (ECG). Psychiatric patients exposed to ⩾1 psychotropic medication(s) represent a group with marked probability of drug-activated QTc-prolongation. Prolonged QTc interval in elderly patients (age > 60 years) is connected to greater risk of all-cause and coronary heart disease deaths. This study aimed at investigating pattern of utilization of QTc-interval protracting medications, QT-extending drug interactions, and prevalence of QTc-interval extending hazard factors in elderly patients.

METHODS

This was a cross-sectional, prospective study at the Psychiatry OPD at All India Institute of Medical Sciences (AIIMS), Rishikesh, Uttarakhand, India from 1 October 2017 to 30 August 2019 employing the pertinent prescriptions.

RESULTS

A total of 832 elderly patients (age 60 years or more) visiting the Psychiatry OPD during the aforementioned study duration were investigated. About 420 (50.5%) patients were males while 412 (49.5%) were females. Of the 832 patients, 588 (70.7%) were using interacting agents with capacity to produce TdP. Almost 1152 interacting torsadogenic medication pairs were unraveled. As per AzCERT/CredibleMeds Classification, 1016 (48.8%), 724 (34.8%), and 248 (12%) agents with potential to interact were identified with 'known', 'possible', and 'conditional risk of TdP', respectively. The common interacting medications belonged to antidepressant (288), proton pump inhibitor (364), antipsychotic (340), antinausea (184), antimicrobial (156), and H2 receptor antagonist (60) therapeutic categories. The all-inclusive frequency of potentially inappropriate psychotropic (PIP) agents administered was 62% (1343/2166) with Beers Criteria 2019, and 46% (997/2166) with STOPP Criteria 2015.

CONCLUSION

Many geriatric patients were administered drugs and drug combinations with heightened proclivity toward QT-interval prolongation. Furthermore, reliable evidence-based online drug knowledge resources, such as AzCERT/CredibleMeds Drug Lists, Medscape Drug Interactions Checker, Epocrates Online Interaction Check, and Drugs.com Drug Interactions Checker, can facilitate clinical professionals in selecting drugs for psychiatric patients. A wise choice of medications is imperative to preclude serious adverse sequelae. Therefore, we need to exigently embrace precautionary safety means, be vigilant, and forestall QT-extension and TdP in clinical environments.

Schizophrenia in the elderly: a special case requiring special management?

As the life expectancy of the general population increases, the population of elderly people with schizophrenia is also expected to increase. Consideration of the particular needs of these patients and the challenges associated with their management is therefore important [45].

The relationship between sleep quality, inappropriate medication use and frailty among older adults in aged care homes in Malaysia

Poor sleep quality is prevalent among older adults and is compounded by frailty and polypharmacy. This descriptive, cross-sectional study examines the associations between sleep quality, inappropriate medication use and frailty. The study was conducted among 151 residents of 11 aged care homes in three states in Malaysia; convenience sampling was used. Subjective sleep quality was assessed using the Pittsburgh Sleep Quality Index (PSQI), and Groningen Frailty Indicator (GFI) was used to assess frailty. Medication appropriateness was assessed using Drug burden Index (DBI), Potentially Inappropriate Medications (PIMs) and Potentially Inappropriate Prescriptions (PIPs). Most of the subjects (approximately 95%) reported poor sleep quality, as measured by a cut-off of global PSQI score of ≥ 5. With a second cut-off at 10, just over half (56%) reported moderately poor sleep quality followed by 39% who had very poor sleep quality. Most (90%) denied taking medication to improve their sleep during the previous month. There was no statistically significant association between medication inappropriateness (PIMs, PIPs, DBI) and global PSQI score. However, the average number of PIM was associated significantly with sleep efficiency (a measure of the actual 'sleep to total time spent in bed) (p = 0.037). The average number of PIP was associated with subjective sleep quality (p = 0.045) and the use of sleep medications (p = 0.001), and inversely associated with sleep disturbance (0.049). Furthermore, frailty correlated significantly with poor overall sleep quality (p = 0.032). Findings support the need for medication review to identify and reduce PIMs and optimise prescriptions to improve sleep quality and hence, related health outcomes among residents of aged care homes.

Use of atypical antipsychotic drugs in old age psychiatry

Antipsychotic drugs are among the most widely prescribed psychotropic medications for elderly people, particularly for the 5–8% of patients who are in institutions. The antipsychotics are indicated for treating psychotic disorders, including schizophrenia, delusional disorder, psychotic symptoms in mood disorders and for a number of organic psychoses.

How Prolific is Psychotropic Medicines Use in People with Dementia in Australia Within the Community Setting? A Retrospective Analysis

Background

When used for a therapeutic purpose such as for psychiatric illness, psychotropic drugs may enhance quality of life; however, when used to treat behaviours associated with dementia, they may have only a modest effect but lead to negative outcomes.

Objective

We undertook an analysis of community-dwelling people with dementia or cognitive impairment to ascertain how prolific psychotropic medicine use is within the Australian community setting, which psychotropic medicines are being prescribed and to whom, and whether the use of such medicines is in accordance with therapeutic guidelines.

Methods

We undertook a retrospective review of medication records, including medication charts, for 412 people with cognitive impairment, discharged from a home nursing service in Victoria, Australia, during the 6-month period between 1 January and 30 June 2013.

Results

Cholinesterase inhibitor use exceeded the number of individuals with a recorded diagnosis of Alzheimer’s disease; in some cases, the dosage exceeded recommendations. Antidepressants were used by more than double the number of people documented with a history of depression. Antipsychotic medicines were prescribed for undocumented purposes, in some cases above maximum response levels, and multiple benzodiazepines were prescribed.

Conclusions

Psychotropic medicine use was common in our study population, and use of these medicines was often not in line with therapeutic guidelines. Further research is required to ascertain reasons for the high use of psychotropic medicines in this group, and greater consideration is required by health professionals of the appropriate use and regular review of psychotropic medicines. Improved documentation of diagnoses and the indications for prescribing psychotropic medicines is needed, as is greater implementation of educational programmes to support care workers and carers.

ADN-1184, a monoaminergic ligand with 5-HT6/7 receptor antagonist action, exhibits activity in animal models of anxiety

Behavioral and psychological symptoms of dementia (BPSD) include apathy, sleep problems, irritability, wandering, elation, agitation/aggression, and mood disorders such as depression and/or anxiety. Elderly patients are usually treated with second-generation antipsychotics; however, they present not enough efficacy against all symptoms observed. Hence, there still is an unmet need for novel pharmacotherapeutic agents targeted BPSD. A novel arylsulfonamide derivative ADN-1184 has been developed that possesses a preclinical profile of activity corresponding to criteria required for treatment of both psychosis and depressive symptoms of BPSD without exacerbating cognitive impairment or inducing motor disturbances. To broaden its pharmacological efficacy toward anxiety symptoms, its anxiolytic properties have been examined in common animal preclinical models in rats and mice. ADN-1184 significantly increased the number of entries into open arms measured in the elevated plus-maze test; however, it simultaneously increased parameters of exploratory activity. In the Vogel conflict drinking test, ADN-1184 dose-dependently and significantly increased the number of shocks accepted and the number of licks. Moreover, in mice, it also had specific anxiolytic-like activity in the four-plate test, and only negligible one at a specific mid-range dose measured in the spontaneous marble burying test. The obtained findings reveal that ADN-1184 displays anxiolytic-like activity in animal models of anxiety which employed punished stimuli. In its unusual combination of some anxiolytic action with already proven antipsychotic and antidepressant properties, and lack of any disruptive impact on learning and memory processes and motor coordination, ADN-1184 displays a profile that would be desired for a novel therapeutic for BPSD.

The development and testing of the quality use of medications in dementia (QUM-D): a tool for quality prescribing for behavioral and psychological symptoms of dementia (BPSD)

BACKGROUND

Behavioral and psychological symptoms of dementia (BPSD) are virtually ubiquitous in dementia. Excessive recourse to use of psychotropics which have high risk to benefit ratio remains a global problem. We aimed to identify components of quality prescribing in BPSD to develop a tool for quality prescribing and to test this tool.

METHODS

We used Delphi methodology to identify elements of quality prescribing in BPSD. The tool was tested by a range of medical and nursing professionals on 48 patients, in inpatient and ambulatory settings in Northern Sydney Local Health District, Australia.

RESULTS

Consensual opinion using Delphi method was that quality prescribing in dementia comprised ten factors including failure to use first line non-pharmacological strategies, indication, choice of drug, consent, dosage, mode of administration, titration, polypharmacy, toxicity, and review. These elements formed the quality use of medications in dementia (QUM-D) tool, lower scores of which reflected quality prescribing, with a possible range of scores from 0 to 30. When inter-rater reliability was tested on a subgroup of raters, QUM-D showed high inter-rater reliability. A significant reduction in QUM-D scores was demonstrated from baseline to follow-up, mean difference being 5.3 (SD = 3.8; 95% confidence interval 4.1-6.4; t = 9.5; df = 47; p < 0.001). There was also a significant reduction in score from baseline to follow-up when rated by clinical nurse consultants from a specialized behavior assessment management service (BAMS) (N = 12).

CONCLUSION

The QUM-D is a tool which may help to improve quality prescribing practices in the context of BPSD. In this setting, we consider quality prescribing, and accordingly the obligations of prescribers, to be an inclusive concept rather than just adding to the mantra of "not prescribing."

High prevalence of psychotropic drug use among persons with and without Alzheimer's disease in Finnish nationwide cohort

Psychotropic drugs are used for treatment of behavioral and psychological symptoms of dementia (BPSD) although they are associated with serious adverse drug events. Objective of our study was to investigate prevalence of psychotropic drug use one year after diagnoses of Alzheimer's disease (AD), to compare prevalence to persons without AD and to assess changes in prevalence over time. Data from the MEDALZ (Medication use and Alzheimer's disease) cohort was utilized in the study including all 69,080 community-dwelling persons with new diagnosis of AD during years 2005-2011 in Finland. Four age-, gender- and region of residence-matched persons without AD were identified for each case. Register-based data included prescription drug purchases and comorbidities from Special Reimbursement Register. Annual prevalence of psychotropic drug use one year after diagnosis was determined for each person. Psychotropic drugs were used by 53% of persons with AD compared with 33% of persons without AD during one year after diagnoses. Persons with AD were six times more likely to use antipsychotics and three times more likely to use antidepressants whereas benzodiazepine and related drug (BZDR) use was comparable between persons with and without AD. According to year of AD diagnoses during 2005-2011, antipsychotic use increased from 18% to 20% (p<0.0001) and BZDR use declined from 31% to 26% (p<0.0001) among persons with AD. Widespread utilization of psychotropic drugs was observed among persons with AD. Despite safety warnings of antipsychotic use for BPSD, antipsychotic use increased from 2005 to 2011 among newly diagnosed persons with AD in Finland.

Antipsychotic drug treatment for elderly people with late-onset schizophrenia

BACKGROUND

Schizophrenia is usually considered an illness of young adulthood. However, onset after the age of 40 years is reported in 23% of patients hospitalised with schizophrenia. At least 0.1% of the world's elderly population have a diagnosis of late-onset schizophrenia which seems to differ from earlier onset schizophrenia on a variety of counts including response to antipsychotic drugs.

OBJECTIVES

To assess the effects of antipsychotic drugs for elderly people with late-onset schizophrenia.

SEARCH METHODS

We searched the Cochrane Schizophrenia Group Trials Register (January 2010) which is based on regular searches of CINAHL, EMBASE, MEDLINE and PsycINFO. We inspected references of all identified studies for further trials. We contacted relevant authors of trials for additional information.

SELECTION CRITERIA

All relevant randomised controlled trials that compared antipsychotic drugs with other treatments for elderly people (at least 80% older than 65 years) with a recent (within five years) diagnosis of schizophrenia or schizophrenia like illnesses.

DATA COLLECTION AND ANALYSIS

For the 2010 search, two new review authors (AE, AG) inspected all citations to ensure reliable selection. We assessed methodological quality of trials using the criteria recommended in the Cochrane Handbook for Systematic Reviews of Interventions. AE and AG also independently extracted data. For homogenous dichotomous data, we planned to calculate the relative risk (RR) and 95% confidence interval (CI).

MAIN RESULTS

There were no included studies in the original version of this review (2002 search). The 2010 search for the current update produced 211 references, among which we identified 88 studies. Only one study met the inclusion criteria and was of acceptable quality. This was an eight-week randomised trial of risperidone and olanzapine in 44 inpatients with late-onset schizophrenia. All participants completed the eight-week trial, indicating that both drugs were well tolerated. Unfortunately, this study provided little usable data. We excluded a total of 81 studies, 77 studies because they either studied interventions other than antipsychotic medication or because they involved elderly people with chronic - not late-onset - schizophrenia. We excluded a further four trials of antipsychotics in late-onset schizophrenia because of flawed design. Five studies are still awaiting classification, and one is on-going.

AUTHORS' CONCLUSIONS

There is no trial-based evidence upon which to base guidelines for the treatment of late-onset schizophrenia. There is a need for good quality-controlled clinical trials into the effects of antipsychotics for this group. Such trials are possible. Until they are undertaken, people with late-onset schizophrenia will be treated by doctors using clinical judgement and habit to guide prescribing.

Are atypical antipsychotics safer than typical antipsychotics for treating behavioral and psychological symptoms of dementia?

Atypical antipsychotics seem to be preferable than conventional agents in treating psychological symptoms of dementia (BPSD), because they have substantially lower risks of extrapyramidal neurological effects with lower reported rates of parkinsonism and tardive dyskinesia. However, in the course of time, with the increase in their use, more and more side effects have been reported. The benefits and risks of antipsychotic treatment should be carefully evaluated according to the co-morbidity and the severity of the psychological and behavioral symptoms and their impact on the individual elderly patient. It is recommended to keep those medications in the lower range of therapeutic doses. Due to the complexity of the individual patient, no guidelines have been yet established. Therefore, clinical judgment should be used in applying the dose and the type of those drugs.

Sedative use and incident cognitive decline among persons aged 75 years and older: a population-based longitudinal study

BACKGROUND

Acute exposure to sedative drugs may induce memory impairment, but there is mixed evidence that long-term sedative use may result in incident cognitive decline. The objective of this study was to investigate the use of sedative drugs and incident cognitive decline in a population-based sample of persons aged 75 years and older.

METHODS

The study sample comprised 781 participants in the Geriatric Multidisciplinary Strategy for the Good Care of the Elderly (GeMS) study in Kuopio, Finland. Data on health status, drug use, and sociodemographic factors were elicited during annual nurse interviews from 2004 to 2007. A linear mixed model was used to compare change in Mini-Mental State Examination (MMSE) scores (2005-2007) among users of sedative drugs in 2004 and 2005 (n = 139) to non-users of sedative drugs from 2004 to 2007 (n = 310). The model was adjusted for covariates including age, gender, education, depressive symptoms and antipsychotic use.

RESULTS

Unadjusted mean MMSE scores were 27.50 in 2005, 26.58 in 2006, and 25.95 in 2007 among users of sedative drugs. Unadjusted mean MMSE scores were 28.05 in 2005, 27.61 in 2006, and 27.09 in 2007 among non-users of sedative drugs. Adjusted mean MMSE scores were 0.31 points lower in 2005, 0.62 points lower in 2006, and 0.93 lower in 2007 among users compared to non-users of sedative drugs (P = 0.051).

CONCLUSIONS

Sedatives were not associated with statistically significant cognitive decline. However, clinicians should maintain a judicious approach to prescribing sedative drugs given the risk of adverse drug events.

Using risperidone for Alzheimer's dementia-associated psychosis

BACKGROUND

Alzheimer's dementia (AD) occurs in 6 - 8% of persons older than 65 years. The prevalence increases to 30% among those 85 years or older. Among AD patients, the incidence of psychosis is 30 - 50%. Safe and appropriate use of psychotropic agents is a relevant clinical concern for this population.

OBJECTIVE

This review addresses risks and potential benefits when risperidone is used for treating AD-associated psychosis.

METHODS

Through literature review and clinical experience, the authors discuss the clinical efficacy, safety, and regulatory issues concerning risperidone treatment for this group of patients.

CONCLUSION

Despite concerns about safety, risperidone remains a popular therapeutic choice for AD patients with psychosis. Subsets of these patients with more severe agitation and aggression may experience greater behavioral benefit.

Symptomatic remission in elderly schizophrenia patients treated with long-acting risperidone

BACKGROUND

In elderly schizophrenia patients remission is difficult to determine due to long disease duration, exposure to differing treatments, long-standing side-effects, non-adherence, cognitive decline and physical comorbidity.

METHOD

Retrospective chart reviews were undertaken of 48 elderly (60+ years) schizophrenia patients admitted to a university-affiliated tertiary psychiatric center in 2006. These patients were experiencing an exacerbation of symptoms at admission. Remission criteria used were those of the American Psychiatric Association's "Remission in Schizophrenia Working Group", and clinical status and improvement were quantified using the Clinical Global Impression scale (CGI).

RESULTS

Of 25 patients treated with long-acting risperidone (LAR), 19 (76%) continued uninterrupted treatment for 6 months or longer. In six patients treatment was discontinued due to insufficient response. The clinical severity ratings with the CGI of all patients were in the range 5-7 prior to treatment. Following six months of LAR treatment, mean dose 36.0 mg/2 weeks (range: 25-50), 18 patients were rated as "improved" or "very much improved" on the CGI-global improvement item scale. In 15/25 patients (60%) symptomatic remission was achieved.

CONCLUSION

LAR may be effective in achieving remission among elderly schizophrenia patients. Tolerability was high and adherence rates improved. However, the results must be treated with caution owing to the inherent bias in this retrospective analysis.

[Drug-induced dementia: a case/non-case study in the French Pharmacovigilance database]

The increased incidence of dementia on the aging population makes this disease a major public health problem. Among known causes of dementia, drug etiology is under considered. We investigated the relationship between exposure to drug therapy and dementia with a case/non-case study using reports of the French Pharmacovigilance database. Among 263 962 adverse effects recorded between 1985 and 2005, 79 (0.03%) are dementia. Median age is 66 (range 3-91). There was 41 women and 37 men. The therapeutic drug class associated with dementia were anticonvulsants, antiparkinsonians, antidepressants, anxiolytics, hypnotics, antipsychotics and morphinics. An association between reporting of dementia and non neurotropic drugs were also found, i.e. interferon alfa-2B, vancomycin and allopurinol. The term "Dementia" is only mentioned in the summary of the characteristics of valproate, but it may concern other drugs. Drug etiology for dementia is a reality but is not necessarily attributed as a cause in aging population, in particular.

Lurasidone (SM-13496), a novel atypical antipsychotic drug, reverses MK-801-induced impairment of learning and memory in the rat passive-avoidance test

Lurasidone (SM-13496) is a novel atypical antipsychotic with high affinities to dopamine D2, serotonin 5-HT7, 5-HT2A, 5-HT1A receptors and alpha2C adrenoceptor. In this study, the effects of lurasidone on the rat passive-avoidance response and its impairment by the N-methyl-D-aspartate (NMDA) receptor antagonist MK-801 (dizocilpine) were evaluated and compared with those of other antipsychotics. The passive-avoidance response was examined by measuring the step-through latency, 1 day after the animals received foot-shock training. When given before the training session, lurasidone did not affect the passive-avoidance response at any dose tested (1-30 mg/kg, p.o.). All the other atypical antipsychotics examined (i.e., risperidone, olanzapine, quetiapine, clozapine and aripiprazole), however, significantly reduced the step-through latency at relatively high doses. A pre-training administration of lurasidone significantly and dose-dependently reversed the MK-801-induced impairment of the passive-avoidance response. At doses lower than those that affected the passive-avoidance response, risperidone, quetiapine, and clozapine partially reduced the MK-801-induced impairment, whereas haloperidol, olanzapine, and aripiprazole were inactive. In addition, the post-training administration of lurasidone was as effective in countering the MK-801 effect as the pre-training administration, suggesting that lurasidone worked, at least in part, by restoring the memory consolidation process disrupted by MK-801. These results suggest that lurasidone is superior to other antipsychotics in improving the MK-801-induced memory impairment and may be clinically useful for treating cognitive impairments in schizophrenia.

Effect of Antipsychotic Medication Use on Memory in Patients With Alzheimer’s Disease: Assessing the Potential Risk for Accelerated Recent Autobiographical Memory Loss

Autobiographical memory loss is a common and disturbing problem for individuals with Alzheimer's disease (AD). Patients with AD who are taking antipsychotic medications may be at further risk for loss of recent autobiographical memory because of the potential anticholinergic side effects of antipsychotics. The purpose of this post hoc, descriptive study was to compare the recent autobiographical memory scores of patients with AD taking antipsychotics to those who were not taking antipsychotics. The study population was composed of 35 patients with moderate-stage AD. Patients who were taking antipsychotics scored significantly worse on a recent autobiographical memory measure compared with patients who were not taking antipsychotics. This study provides further evidence for judicious use of antipsychotic medications with AD patients.

Efficacy and tolerability of quetiapine in the treatment of behavioral and psychological symptoms of dementia

Behavioral symptoms start to appear in mild and moderate dementia and become increasingly severe with the progression of the disease. Agitation, aggressiveness, and psychosis can be seen in Alzheimer's disease, and in particular are common manifestations in Lewy body dementia. It is the behavioral disturbances rather than the cognitive disorders that are more often the cause of the institutionalization of these patients because of the heavy assistance and emotional burden they represent for caregivers. Traditionally, these kinds of symptoms were controlled by classical antipsychotic agents, which after long-term use cause severe extrapyramidal effects, late dyskinesia, sedation, orthostatic hypotension, and cognitive function impairment. More recently, atypical antipsychotic agents have shown a better tolerability profile, with a reduced incidence of extrapyramidal effects, orthostatic hypotension, sedation, and a reduced impact on cognitive function. The aim of this study is to evaluate the efficacy and tolerability of quetiapine in a group of patients with a diagnosis of dementia and concomitant psychotic disorders. The response to treatment was evaluated by the Neuropsychiatric Inventory (NPI) and the Behavioral Pathology in Alzheimer's Disease Rating Scale (BEHAVE-AD). The NPI and BEHAVE-AD were administered at baseline and after 4 weeks and 12 weeks of therapy. Tolerability was assessed by the incidence of clinically evident side effects. The results show that quetiapine is effective in reducing behavioral symptoms, deliria and hallucinations, aggressiveness, and sleep disturbances. Quetiapine tolerability proved to be satisfactory. The only side effect of clinical significance was orthostatic hypotension, which was, however, partially preventable by a slower drug titration.

Atypical antipsychotics to treat the neuropsychiatric symptoms of dementia

Neuropsychiatric symptoms are common in older adults with dementia and can be associated with a rapid decline in cognitive and functional status. This article reviews the current literature supporting the use of atypical antipsychotic medications in this population. Among the currently available atypical antipsychotics, risperidone and olanzapine have been the most widely studied in double-blind, randomized, placebo-controlled clinical trials. Despite the common use of other atypical antipsychotic medications, their efficacy and safety in older adults with dementia has not been as extensively studied. Some controversy surrounds the use of atypical antipsychotic agents in older adults with the suggestion that they may increase the incidence of stroke or even death. Despite the potential for increased risk of harm from the use of these medications, atypical antipsychotics are often effective in treating troublesome neuropsychiatric symptoms refractory to other treatments. Whenever possible, these atypical antipsychotic drug treatments should be combined with non-pharmacological treatments to limit the need and dose of antipsychotic drugs and constant monitoring for potential harms should be maintained. The choice of which atypical antipsychotic agent can be guided by the nature and severity of the target symptom and the medication least likely to cause harm to the patient.

Effects of ramelteon on patient-reported sleep latency in older adults with chronic insomnia

BACKGROUND AND PURPOSE

To assess the efficacy and safety of ramelteon, a selective MT(1)/MT(2) receptor agonist, for chronic insomnia treatment.

PATIENTS AND METHODS

Randomized, double-blind, placebo-controlled 35-night outpatient trial with weekly clinic visits at multiple centers. Patients include older adults (>or=65 years; N=829) with chronic insomnia. Placebo, ramelteon 4mg, or ramelteon 8mg were taken nightly for five weeks, and patient-reported sleep data were collected using sleep diaries. Primary efficacy was sleep latency at week 1. Sustained efficacy was examined at weeks 3 and 5. Rebound insomnia and withdrawal effects were evaluated during a 7-day placebo run-out.

RESULTS

Both doses of ramelteon produced statistically significant reductions in sleep latency vs. placebo at week 1 (ramelteon 4mg: 70.2 vs. 78.5min, P=.008; ramelteon 8mg: 70.2 vs. 78.5 min, P=.008). Patients continued to report reduced sleep latency at week 3 with ramelteon 8mg (60.3 vs. 69.3min, P=.003), and at week 5 with ramelteon 4 mg (63.4 vs. 70.6 min, P=.028) and ramelteon 8 mg (57.7 vs. 70.6 min; P<.001). Statistically significant increases in total sleep time were observed with ramelteon 4 mg at week 1 (324.6 vs. 313.9 min, P=.004) and week 3 (336.0 vs. 324.3min, P=.007) compared with placebo. There was no evidence of significant rebound insomnia or withdrawal effects following treatment discontinuation. The incidence of adverse events was similar among all treatment groups; most were mild or moderate.

CONCLUSIONS

In older adults with chronic insomnia, ramelteon significantly reduced patient reports of sleep latency over five weeks of treatment with no significant rebound insomnia or withdrawal effects.

Concomitant use of analgesics and psychotropics in home-dwelling elderly people-Kuopio 75 + study

AIMS

To investigate the extent of concomitant use of analgesic and psychotropic medicines among home-dwelling elderly people aged at least 75 years in Finland.

METHODS

This was a population-based study in Finland, performed as part of Kuopio 75 + study focusing on the clinical epidemiology of diseases, medication and functional capacity. A random sample of 700 persons was drawn from the total population of the city of Kuopio, eastern Finland, aged 75 years on January 1, 1998 (n = 4518). Ninety-nine persons could not be examined and 78 were living in long-term institutions, so that the number of home-dwelling elderly persons amounted to 523. A trained nurse interviewed the participants about their use of medicines, and a geriatrician examined their overall physical and mental status. Dementia and depression were diagnosed according to the DSM IV criteria. Both regular and irregular prescribed and nonprescribed drug use was recorded.

RESULTS

Every fourth elderly person (27.2%) used analgesics and psychotropics concomitantly, this use becoming twice as common with advancing age (19.6% in the age group 75-79 years, 38.2% among the oldest, aged 85 + years). Concomitant use of psychotropics and opioids also became more common with increasing age (2.8% in age group 75-79 years and 9.6% in the oldest group, aged 85 + years). The use of opioids was nearly twice as common among concomitant users (19.7%) than among those using only analgesics (11.3%). Concomitant users suffered from interfering daily pain and daily pain at rest more commonly than nonusers of analgesics. Depression, sleeping problems and polypharmacy were more common among the concomitant users, who had also had more hip fractures than the rest.

CONCLUSIONS

Concomitant use of analgesics and psychotropics becomes more common with advancing age and is a potential risk factor for adverse drug effects.

Therapeutic Drug Monitoring and Pharmacogenetic Tests as Tools in Pharmacovigilance

Therapeutic drug monitoring (TDM) and pharmacogenetic tests play a major role in minimising adverse drug reactions and enhancing optimal therapeutic response. The response to medication varies greatly between individuals, according to genetic constitution, age, sex, co-morbidities, environmental factors including diet and lifestyle (e.g. smoking and alcohol intake), and drug-related factors such as pharmacokinetic or pharmacodynamic drug-drug interactions. Most adverse drug reactions are type A reactions, i.e. plasma-level dependent, and represent one of the major causes of hospitalisation, in some cases leading to death. However, they may be avoidable to some extent if pharmacokinetic and pharmacogenetic factors are taken into consideration. This article provides a review of the literature and describes how to apply and interpret TDM and certain pharmacogenetic tests and is illustrated by case reports. An algorithm on the use of TDM and pharmacogenetic tests to help characterise adverse drug reactions is also presented. Although, in the scientific community, differences in drug response are increasingly recognised, there is an urgent need to translate this knowledge into clinical recommendations. Databases on drug-drug interactions and the impact of pharmacogenetic polymorphisms and adverse drug reaction information systems will be helpful to guide clinicians in individualised treatment choices.

Adverse Effects of Atypical Antipsychotics in the Elderly

Use of antipsychotic medication is very common in the elderly and often an essential therapy. However, successful treatment in the elderly requires appropriate multidimensional assessment of the patient, knowledge of possible multiple co-morbidities, and awareness of the complexities of polypharmacy, age-dependent changes in pharmacokinetics and pharmacodynamics, and drug-drug interactions in this age group. Antipsychotics are known to have a number of adverse effects. New antipsychotics, such as amisulpride, clozapine, olanzapine, risperidone, quetiapine, ziprasidone, zotepine and aripiprazole, may interact with both dopamine and serotonin receptors. However, compared with conventional antipsychotics, they are less likely to cause extrapyramidal symptoms and are better tolerated in the elderly. At the same time, consistent differences between atypical antipsychotics have been demonstrated. Use of clozapine, for example, is limited by the risk of agranulocytosis, whereas this is not a disadvantage of olanzapine, risperidone, quetiapine and, more recently, ziprasidone, which are being widely used with good results in schizophrenia. However, use of the latter agents to treat the behavioural and psychological symptoms of dementia has been restricted because of recent observations of increased cardiovascular events in patients taking risperidone and olanzapine treatment. Nonetheless, careful review of the literature suggests that the available evidence does not support any causal relationship between use of risperidone or olanzapine and cardiovascular events. This article focuses on some of the main adverse effects commonly reported during administration of atypical antipsychotics to elderly patients. Such effects may be partly explained by age-related changes in pharmacokinetics and pharmacodynamics, and partly by the characteristics of the drugs themselves and their different receptor binding profiles.

The efficacy and safety of quetiapine for treatment of geriatric psychosis

Quetiapine, an atypical antipsychotic, is effective for psychosis in younger patients, with limited adverse effects reported. This open-label naturalistic study was conducted to assess the 4-week efficacy and safety of quetiapine for treatment of geriatric psychosis. Clinical efficacy was evaluated using the Brief Psychiatric Rating Scale (BPRS) and Clinical Global Impression Improvement (CGI-I) instruments before and after 4 weeks of quetiapine treatment. The sample population consisted of 100 geropsychiatric inpatients with psychosis, with the therapeutic evaluation completed by 91. Eighty-one of these 91 patients (89.0%) experienced mild-to-substantial improvement, as determined from the CGI-I. Further, a mean reduction in BPRS score of 39.5% (from baseline) was also determined. The mean daily dose of quetiapine for the fourth week was 276.1 177.2mg/day (range 50-800). Higher quetiapine dosages were administered for patients with functional psychoses compared to an analogous group with organic mental disorders. The most common adverse effects were somnolence (30.0%), lower-limb weakness (28.0%) and dizziness (27.0%). Body weight and fasting triglyceride were significantly elevated after quetiapine treatment (2.2% and 8.9% from baseline, respectively). Based on the results of this study, it appears that quetiapine is an efficacious and safe treatment for geriatric inpatients with psychosis, however, there is a wide dosing range and optimal dosage is diagnosis-dependent.

Étude pilote préliminaire de l’acétate de cyprotérone dans les comportements agressifs associés aux démences sévères

INTRODUCTION

Behavioral symptoms are common in dementia, and seem to be more frequent in men than in women. Agitation is frequently responsible for caregiver burn-out and leads to institutionalization. The dramatic increase in the prevalence of Alzheimer's disease and related disorders requires better management of behavior symptoms. Although environmental adaptation has been proposed recently, for many years, psychoactive medications and physical restraints were the primary approach. However, in severely demented patients, both pharmacologic and non-pharmacologic treatments are inoperative. In this situation, alternative pharmacologic approach should be tested. Cyproterone acetate, an antiandrogen and progestative steroid has never been proposed to prevent aggressive behavior in dementia, but its favorable effect is well described in rat and monkey aggressivity.

PATIENTS AND METHODS

Cyproterone acetate was proposed for 19 demented patients who developed severe aggressive behaviors or an agitation unresponsive to psychoactive drugs (even in association) or to environmental adaptation. Clinical and behavioral analysis was carried out using the Cohen-Mansfield agitation inventory associated with an assessment of dependency in daily life activities, before and during treatment with cyproterone acetate. The behavioral status was stable, with permanent or repetitive agitation. Seven patients had vascular dementia, 7 had Alzheimer's disease, 2 had fronto-temporal degeneration, 2 had Huntington's disease and 1 a probable diffuse Lewy bodies disease. Fifteen patients had prominent aggressive behavior and 4 had predominant aberrant motor behavior with aggressive behavior.

RESULTS

Cyproterone (50 to 100mg - mean: 92.5mg daily) improved significantly aggressive and impulsive behavior related to Alzheimer's disease or vascular dementia but had no effect on aberrant motor behavior. When cyproterone was stopped, aggressive behaviors reappeared more rapidly in vascular dementia.

CONCLUSION

Cyproterone acetate is then an interesting choice when aggressive behavior is not improved with psychotropic drugs. A detailed clinical analysis is required to avoid the use of cyproterone in non-aggressive and non-impulsive patients. The results of this preliminary study suggest a randomized double-blind study should be carried out in the near future. The behavior improvement could be related to the blockage of androgen receptors, and simultaneously to the sedative effect of progestative drugs.

Validation of the Investigator's Assessment Questionnaire, a new clinical tool for relative assessment of response to antipsychotics in patients with schizophrenia and schizoaffective disorder

The success of long-term therapy in schizophrenia is contingent upon real-world effectiveness or improvements in several domains, including efficacy, safety and tolerability. This report describes the Investigator's Assessment Questionnaire (IAQ), a new 10-item instrument designed to assess relative effectiveness (efficacy, safety and tolerability) of antipsychotic medications in patients with schizophrenia or schizoaffective disorder. To measure content validity, 300 psychiatrists rated the importance of the IAQ items. Efficacy (i.e., positive and negative symptoms) was considered most important, but importance scores relative to the mean ranged only from 0.87 to 1.18, suggesting similar importance of the items. Cronbach's coefficient alpha values showed that the items were internally consistent. Factor analyses indicated that all IAQ items belong to a single domain. Data from the US Broad Effectiveness Trial of Aripiprazole were used for construct validation. Total IAQ score correlated significantly with time to treatment discontinuation (r=-0.50), Clinical Global Impressions-Improvement (CGI-I) score (r=0.76) and medication preference of patients (r=0.71) or caregivers (r=0.70). A one-unit decrease in IAQ score corresponded to an additional 1.35 days in the study and a decrease in CGI-I of 0.21 units. These results provide initial validation of the IAQ as a tool for evaluating antipsychotic response in patients with schizophrenia or schizoaffective disorder.

Cholinergic-serotonergic imbalance contributes to cognitive and behavioral symptoms in Alzheimer's disease

Neuropsychiatric symptoms seen in Alzheimer's disease (AD) are not simply a consequence of neurodegeneration, but probably result from differential neurotransmitter alterations, which some patients are more at risk of than others. Therefore, the hypothesis of this study is that an imbalance between the cholinergic and serotonergic systems is related to cognitive symptoms and psychological syndromes of dementia (BPSD) in patients with AD. Cholinergic and serotonergic functions were assessed in post-mortem frontal and temporal cortex from 22 AD patients who had been prospectively assessed with the Mini-Mental State examination (MMSE) for cognitive impairment and with the Present Behavioral Examination (PBE) for BPSD including aggressive behavior, overactivity, depression and psychosis. Not only cholinergic deficits, but also the cholinacetyltransferase/serotonin ratio significantly correlated with final MMSE score both in frontal and temporal cortex. In addition, decreases in cholinergic function correlated with the aggressive behavior factor, supporting a dual role for the cholinergic system in cognitive and non-cognitive disturbances associated to AD. The serotonergic system showed a significant correlation with overactivity and psychosis. The ratio of serotonin to acetylcholinesterase levels was also correlated with the psychotic factor at least in women. It is concluded that an imbalance between cholinergic-serotonergic systems may be responsible for the cognitive impairment associated to AD. Moreover, the major findings of this study are the relationships between neurochemical markers of both cholinergic and serotonergic systems and non-cognitive behavioral disturbances in patients with dementia.

Prevalence, correlates, and associated outcomes of potentially inappropriate psychotropic use in the community-dwelling elderly

BACKGROUND

Previous applications of the Beers criteria have shown significant prescribing of potentially inappropriate psychotropic agents for the community-dwelling elderly. However, there is limited information at the national level on potentially inappropriate psychotropic use, the characteristics of elderly persons at risk, and the impact of this inappropriate use on health care outcomes.

OBJECTIVE

This study addressed the prevalence, correlates, and associated outcomes of potentially inappropriate psychotropic use among community-dwelling elderly persons in the United States who were receiving psychotropic medications.

METHODS

Data from the 1996 Medical Expenditure Panel Survey (MEPS) were employed to examine the use of psychotropic medications that generally should be avoided in the elderly and those that should be avoided in elderly patients with certain preexisting conditions, as defined by the Beers criteria. The MEPS sampling weights were used to derive national estimates. Cross-sectional data were analyzed by multivariate analyses to examine the correlates and associated health care outcomes (health care utilization, economic, and humanistic) of potentially inappropriate psychotropic use in the elderly.

RESULTS

An estimated 2.30 million community-dwelling elderly persons received potentially inappropriate psychotropic medications in 1996. This represented 7.14% of all community-dwelling elderly persons and 37.86% of all community-dwelling elderly persons using psychotropic agents; 32.94% of those taking psychotropic drugs received agents that were generally inappropriate, and 10.21% received agents that were inappropriate in the presence of specific conditions. The rates of potentially inappropriate psychotropic use in those receiving antidepressant, antianxiety, and sedative/hypnotic agents were 50.93%, 31.84%, and 23.49%, respectively. Multivariate analyses showed that correlates of potentially inappropriate psychotropic use in the elderly were age <75 years and use of multiple psychotropic agents. After controlling for predisposing, enabling, and need factors, no association was found between the use of potentially inappropriate psychotropic medications and differences in health care utilization, economic, or humanistic outcomes.

CONCLUSIONS

The study findings suggest that although the use of potentially inappropriate psychotropic medications is common among the community-dwelling elderly who are prescribed psychotropic agents, the unfavorable risk-benefit ratio of these inappropriate medications does not appear to influence broad measures of health care utilization, costs, or quality of life in this population.

A comparison of extrapyramidal symptoms in older outpatients treated with quetiapine or risperidone

OBJECTIVE

To compare the tolerability of quetiapine with risperidone in older outpatients.

RESEARCH DESIGN AND METHODS

Post hoc analysis of a subset of older patients (aged 60-80; n = 92) from a randomized, 4-month, multicenter, open-label trial comparing quetiapine and risperidone in an outpatient setting. Participants had various neuropsychiatric disorders associated with psychosis as defined by criteria from the Diagnostic and Statistical Manual of Mental Disorders (4th edn).

MAIN OUTCOME MEASURES

The main outcome measure was an extrapyramidal symptoms (EPS) checklist, used to assess motor symptoms, including parkinsonism, at baseline and after treatment. The Positive and Negative Syndrome Scale (PANSS) and the Clinical Global Impression scale were used to assess therapeutic efficacy.

RESULTS

Substantial EPS (defined as EPS requiring a dosage adjustment or use of medication to reduce EPS) occurred less often with quetiapine (median dosage, 200 mg/day) than with risperidone (median dosage, 3 mg/day); odds ratio, 0.31 (P < 0.03). Quetiapine was also less likely than risperidone to cause akathisia or hypertonia. Both compounds produced comparable reductions in PANSS scores.

CONCLUSIONS

Interpretation of findings in this report is limited by the open-label design of the study and the post hoc nature of this analysis. However, the results suggest that quetiapine, when given within the recommended dosage range, has a benign EPS profile, with potentially greater tolerability and comparable efficacy to risperidone in older outpatients with psychotic disorders.

Positive behavioural disturbances in the rehabilitation phase after severe traumatic brain injury: an historic cohort study

PRIMARY OBJECTIVE

To investigate the association of post-traumatic amnesia (PTA) with positive behavioural disturbances (PBD) in an historic cohort of patients with severe traumatic brain injury (TBI) and to evaluate the use and effects of neuroleptic drugs in this cohort.

RESEARCH DESIGN

Historic cohort study.

METHODS

The medical files of 60 patients with severe TBI, selected for inpatient rehabilitation during a period of 5.5 years, were independently examined for the presence of PTA and PBD at admission in the rehabilitation centre as well as for the concomitant use of neuroleptic drugs. All TBI patients with PBD at admission were subjected to special nursing measures consisting of a structured and safe environment, a minimum number of caregivers and provision of simple and consistent feedback. As a basic policy, the use of neuroleptic medication was minimized or stopped.

RESULTS

Of the 28 patients suffering from PTA at admission, 16 demonstrated PBD (positive predictive value 0.57 (95% CI 0.45-0.70)). In contrast, all the 32 patients without PTA but one did not show PBD (negative predictive value 0.97 (95% CI 0.93-1.00)). Seven of the 17 patients with PBD (41%) had been prescribed neuroleptic medication, of whom five patients (81%) experienced undesired side effects. Because of the special nursing measures, these drugs could be stopped or substituted by non-neuroleptic behaviour-modifying drugs in all patients within 3 weeks, without aggravation of their PBD.

CONCLUSIONS

These results suggest that impaired attention and memory may play a critical role in the development of PBD in patients with severe TBI. From this perspective, maximum effort must be made to improve TBI patients' level of attention, memory and orientation instead of using mechanical or chemical restraints.

Psychosis in elderly patients: classification and pharmacotherapy

Psychosis in elderly patients is a growing clinical concern because psychotic symptoms most frequently occur as noncognitive manifestations of Alzheimer's disease, as side effects of drug therapy for Parkinson's disease, or as the primary abnormalities in schizophrenia, and the clinical characteristics of psychosis are distinct for each. In planning antipsychotic pharmacotherapy for elderly patients, age-related pharmacokinetic changes, polypharmacy for comorbid diseases, and concerns about the underlying conditions responsible for the psychotic symptoms must be considered. Traditional antipsychotic agents bind to dopamine receptors and effectively relieve positive schizophrenic symptoms but frequently cause tardive dyskinesia and other extrapyramidal symptoms, a problem for elderly patients, particularly for those with Parkinson's disease. Atypical antipsychotics bind to dopamine and serotonin receptors, relieving both positive and negative symptoms, and are less likely to cause extrapyramidal symptoms. The authors review common diagnostics associated with psychosis in the elderly and clinical guidelines to selecting antipsychotic pharmacotherapy.

Use of psychotropics among home-dwelling nondemented and demented elderly

OBJECTIVE

To describe the use of psychotropics in the nondemented and demented elderly.

PARTICIPANTS

The home-dwelling elderly (n=523) among the random sample of 700 subjects from the total population of individuals aged 75 years or more in 1998 and living in the city of Kuopio, Finland.

METHODS

A trained nurse interviewed the participants about their health and current use of medicines. A geriatrician performed clinical examinations and diagnosed diseases. Dementia and depression were diagnosed according to the DSM-IV criteria.

RESULTS

The demented subjects used more medicines of all kinds (p<0.01), and especially more psychotropics than the nondemented (p<0.001). One in four demented subjects, compared to one in ten nondemented ones used at least two psychotropics (p<0.01). The demented subjects used antipsychotics six times more often than the nondemented ones (p<0.001). Among the nondemented subjects, one out of two antipsychotics users was suffering from depression according to DSM-IV criteria. Three out of four persons who had dementia with Lewy bodies were using psychotropics. Persons with moderate dementia were more commonly using all kinds of psychotropic preparations especially, antipsychotics three times more commonly than persons with mild or severe dementia.

CONCLUSION

Psychotropics, especially antipsychotics, are commonly used in the treatment of both nondemented and demented elderly, even without proper indication. Physicians need more training about the appropriate use of psychotropics to minimize their adverse effects.

Zuclopenthixol facilitates memory retrieval in rats: possible involvement of noradrenergic and serotonergic mechanisms

Although disturbed memory function often coexists with psychosis, the cognitive effects of antipsychotic medications with diverse pharmacodynamic properties are rarely investigated. The neurocognitive profile of zuclopenthixol, a thioxanthene dopaminergic antagonist and a conventional neuroleptic agent, has yet to be investigated despite the effect of the drug on a variety of neurotransmitter systems involved in mediation of learning and memory processes. In this study, the effect of zuclopenthixol was tested on memory retrieval 24 h after training using an inhibitory avoidance task in rats. Acute administration of zuclopenthixol (0.7 and 1.4 mg/kg i.p.) before retrieval testing increased step-through latency during the test session. The same doses of zuclopenthixol did not affect the ambulatory activity of rats in the openfield test and therefore the facilitatory effect of the drug on memory function could not be confounded with any motoric properties. This study also investigated the effect of zuclopenthixol on cortical and hippocampal monoaminergic neurotransmitters' levels together with acetylcholinesterase enzyme (AChE) activity, both of which are known to be important in control of cognitive function. Administration of zuclopenthixol (0.7 and 1.4 mg/kg i.p.) neither affected dopamine (DA) level nor AChE activity in rat cortex and hippocampus. On the other hand, the lower dose of zuclopenthixol elevated cortical norepinephrine (NE) level, while the higher dose elevated both cortical and hippocampal NE level together with hippocampal serotonin (5-HT) level. These results may suggest the involvement of adrenergic and serotonergic mechanisms in the facilitatory effect of zuclopenthixol on retrieval memory. Zuclopenthixol may therefore be a better alternative than other commonly used antipsychotic medications reported to impair cognitive function of schizophrenic patients.

Kuopio 75+ study: does advanced age predict more common use of psychotropics among the elderly?

The elderly use more psychotropic medication than the general population, and its use has grown during recent decades. The aim of this study was to describe the use of psychotropics in the home-dwelling elderly aged 75 years or older in Finland. This Kuopio 75+ Study is a population-based health survey. A random sample of 700 subjects were drawn from the total population of people aged 75 years or more in January 1998. A geriatrician and a trained nurse carried out clinical examination and interview about the use of medicines for 523 home-dwelling elderly. At least one psychotropic medication was used by 37% of the sample, and 12% were using two or more psychotropics concomitantly. The psychotropic users were older, more often widowed and living alone compared to subjects without psychotropic medication. The probability of psychotropic use increased linearly with age for anxiolytics/hypnotics or antipsychotics, but not for antidepressants. Psychotropics are commonly used in the elderly, particularly among those aged 85 years or more, who are most vulnerable to adverse effects. Careful consideration is needed before prescribing psychotropics to the elderly.

The use of atypical antipsychotics in traumatic brain injury

The use of antipsychotic medication in treating individuals with traumatic brain injury (TBI) has been controversial. Much of the caution derives from animal studies (and limited human data) with regard to typical antipsychotics. Of note, however, is that similar assumptions have been made about the newer generation of atypical antipsychotics as well. Because these agents have different mechanisms of action as well as different neurotransmitter targets, this may very well be unwarranted. In this article, mechanisms of action of typical and atypical antipsychotics are discussed, with particular attention paid to their use in TBI. Indications and contraindications are presented, and recommendations are made for the responsible prescribing of antipsychotic medications after TBI.

Antipsychotic drug treatment for elderly people with late-onset schizophrenia

BACKGROUND

At least 0.1% of the world's elderly population have a diagnosis of schizophrenia that started late in life and prognosis may be made worse by delay and avoidance of treatment.

OBJECTIVES

To assess the effects of antipsychotic drugs for elderly people with late-onset schizophrenia.

SEARCH STRATEGY

We searched the Cochrane Schizophrenia Group trials register (September 2002). This register is compiled by methodical searches of BIOSIS, Cochrane Central Register of Controlled Trials (CENTRAL), CINAHL, Dissertation Abstracts, EMBASE, LILACS, MEDLINE, PSYNDEX, PsycINFO, RUSSMED, Sociofile, supplemented with hand searching of relevant journals and numerous conference proceedings. References of all identified studies were also inspected for more trials.

SELECTION CRITERIA

All relevant randomised controlled trials that compared atypical antipsychotic drugs with other treatments for elderly people (at least 80% of whom should be over 65 years of age) with a recent (within five years) diagnosis of schizophrenia or schizophrenia like illnesses such as delusional disorder, schizoaffective disorder, schizophreniform psychosis or paraphrenia.

DATA COLLECTION AND ANALYSIS

All citations were inspected by the principal reviewer (SA) and papers ordered and re-inspected (by IA, NAQ, SP) to ensure reliable selection. Methodological quality of trials would have been assessed using the Cochrane Reviewers' Handbook criteria and data would have been independently extracted. Data were to have been excluded if loss to follow up was greater than 50%. For homogeneous dichotomous data the relative risk (RR), 95% confidence interval (CI), and the number needed to treat (NNT) and number needed to harm (NNH), were to have been calculated based on an intention-to-treat basis.

MAIN RESULTS

Electronic searching produced 119 references, 65 of which were selected for examination of the full text. These referred to 38 studies. Not one study met the entry criteria for this review. Most were randomised but involved elderly people with chronic schizophrenia. Four trials involved people with schizophrenia, and did include a minority who suffered from paraphrenia. Outcomes for this sub-group, however, were not reported. One randomised study (n=18) did focus on late onset schizophrenia, but unfortunately the two treatments under evaluation, remoxipride and thioridazine, have both been withdrawn from use.

REVIEWER'S CONCLUSIONS

There is no trial-based evidence upon which to base guidelines for the treatment of late onset schizophrenia. This review highlights the need for good quality controlled clinical trials to address the effects of antipsychotic drugs for this group. Such trials are possible. Until they are undertaken people with late onset schizophrenia will be treated by doctors using clinical judgement and habit to guide prescribing.

Conventional and Atypical Antipsychotics in the Elderly

Psychoses are major mental disorders marked by derangement of personality and loss of contact with reality, and are common in the elderly. Various hypotheses suggest the pivotal role of abnormal neurotransmitter and neuropeptide systems in psychotic patients, the most studied of which are the dopaminergic, serotonergic and glutamatergic systems. In particular, long-term treatment with antagonists at dopamine (D) and serotonin (5-hydroxytryptamine; 5-HT) receptors and agonists at glutamate receptors may improve symptoms. Treatment with antipsychotics is very common in the elderly and often indispensable. However, for successful treatment it is essential to have an adequate multidimensional assessment of the geriatric patient and of his or her polypathology and polypharmacy, together with knowledge of age-dependent pharmacokinetics and pharmacodynamic changes and drug-drug interactions.Conventional antipsychotics such as haloperidol, chlorpromazine, promazine, tiapride and zuclopenthixol are D(2)-receptor antagonists and inhibit dopaminergic neurotransmission in a dose-related manner. They decrease the intensity of all psychotic symptoms, although not necessarily to the same extent and with the same time course. Negative symptoms may persist to a much more striking extent than delusions, hallucinations and thought disorders, and there is a dose-related incidence of extrapyramidal side effects (EPS). Newer antipsychotics, such as clozapine, olanzapine, risperidone, quetiapine and ziprasidone, have a different receptor-binding profile, interacting with both D and 5-HT receptors; they less frequently cause EPS and are better tolerated in the elderly. Their use is advantageous because they are effective both on positive and negative symptoms of schizophrenia and may also be used in the treatment of behavioural disturbances in elderly and/or demented individuals. The use of clozapine is limited by the onset of agranulocytosis, whereas olanzapine, risperidone, quetiapine and, more recently, ziprasidone are widely used, with good results in the above-mentioned diseases.

Association between the APOE genotype and psychopathologic symptoms in Alzheimer's disease

BACKGROUND

Psychiatric symptoms occur frequently in the course of AD, are a frequent contributor to institutionalization, predict cognitive decline and death, and often require treatment with psychotropic medications. Previous studies investigating the association between APOE genotype and psychiatric symptomatology in AD have reported contradictory results.

OBJECTIVE

To determine whether APOE genotype predicts incident psychiatric symptomatology in patients with AD.

METHODS

Eighty-seven patients with AD at early stages and no psychiatric history were followed semiannually for up to 9.3 years (mean 5.5 years) for development of delusions, illusions, hallucinations, behavioral symptoms, and depression. Cox proportional hazards models were used to examine the relative risk for incident psychiatric symptomatology (outcome) in relation to APOE genotype (predictor).

RESULTS

The presence of one epsilon4 allele carried a 2.5-fold risk, whereas the presence of two epsilon4 alleles carried a 5.6-fold risk for development of delusions. The associations remained significant even when age, ethnicity, sex, education, duration of disease, and cognitive and functional performance were controlled for. The presence of two epsilon4 alleles was associated with reduced risk for developing hallucinations in the adjusted analysis only. No significant associations were detected between APOE genotype and the incidence of illusions, behavioral symptoms, or depression.

CONCLUSION

The presence of one or more epsilon4 alleles is a significant predictor for the incidence of delusions in the course of AD.

Effects of newer antipsychotics on extrapyramidal function

Following acceptance of clozapine as a superior antipsychotic agent with low risk of adverse extrapyramidal syndromes (EPS), such as dystonia, parkinsonism, akathisia or tardive dyskinesia, several novel antipsychotic drugs have been developed with properties modelled on those of clozapine. Though generally considered 'atypical' in their relatively low risk of inducing EPS, these agents vary considerably in their pharmacology and impact on neurological functioning. Although few comparative data are available, the atypical antipsychotics can be tentatively ranked by EPS risk (excluding akathisia and neuroleptic malignant syndrome) in the following order: clozapine < quetiapine < olanzapine = ziprasidone. At higher doses, risperidone is ranked with a higher EPS risk than olanzapine and ziprasidone, but its risk of EPS is lower with lower doses. In general, this ranking is inversely related to antidopaminergic (D2 receptor) potency. The high antiserotonergic (5-HT2A receptor) potency of risperidone, clozapine, ziprasidone and olanzapine, but not quetiapine, as well as the antimuscarinic activity of olanzapine and clozapine may also limit EPS. For the treatment of psychotic reactions to dopamine agonist therapy in Parkinson's disease, clozapine is both effective and relatively well tolerated; quetiapine may be tolerated, olanzapine is not well tolerated, risperidone is poorly tolerated, and amisulpride and ziprasidone have not been well evaluated. Clozapine, perhaps because of its anticholinergic activity, can reduce parkinsonian tremor. It is useful for ongoing psychosis with tardive dyskinesia, especially for dystonic features. No atypical antipsychotic is clearly effective for motor abnormalities in Huntington's disease or Tourette's syndrome, and the effect of these drugs on other neurological disorders have been well evaluated in only small numbers of patients. In summary, with the exception of clozapine, and perhaps quetiapine, atypical antipsychotics have brought only relative avoidance of EPS, strongly encouraging continued searches for novel antipsychotic agents.