Pharmacotherapy of depression in old age

Antidepressant prescriptions and adherence in primary care in India: Insights from a cluster randomized control trial

BACKGROUND

The World Health Organization recommends that treatment of depression in low and middle-income countries with a scarcity of psychiatrists could be done in primary care and should include prescription of antidepressant medications for moderate and severe depression. Little is known, however, about the actual practices of antidepressant prescription by primary care physicians in low and middle-income countries, nor about adherence by people receiving such prescriptions. In a large study of primary care clinics in Goa, India, we examined the relationship of actual to recommended prescribing practices for depression, among all patients who screened positive for common mental disorder. We also examined other patient and clinic characteristics associated with antidepressant prescription, and self-reported adherence over a one-month period.

METHODS

Patients attending 24 primary care clinics were screened for common mental disorders. Those who screened positive were eligible to enroll in a trial to assess the effectiveness of a collaborative stepped care (CSC) intervention for mental disorders. Physicians in the 12 intervention and 12 control clinics (usual care) were free to prescribe antidepressants and follow-up interviews were conducted at 2, 6 and 12 months. Screening results were shared with the physician, but they were blinded to the diagnosis generated later using a standardized diagnostic interview administered by a health counsellor. We categorized these later diagnoses as "moderate/severe depression", "mild depression or non-depression diagnosis", and "no diagnosis". We used a two-level hierarchical logistic regression model to examine diagnostic and other factors associated with antidepressant prescription and one-month adherence.

RESULTS

Overall, about 47% of screened positive patients (n = 1320) received an antidepressant prescription: 60% of those with moderate/severe depression, 48% of those with mild depression or non-depression diagnosis, and 31% with no diagnosis. Women (OR 1.29; 95%CI 1.04-1.60) and older adults (OR 1.80; 95%CI 1.32-2.47) were more likely to receive an antidepressant prescription. While the overall rate of antidepressant prescription was similar in clinics with and without CSC, patients without any diagnosis were more likely to receive a prescription (OR 2.20 95% CI 1.03-4.70) in the usual care clinics. About 47% of patients adhered to antidepressant treatment for one month or more and adherence was significantly better among older adults (OR 3.92; 95% CI 1.70-8.93) and those who received antidepressant as part of the CSC treatment model (OR 6.10 95% CI 3.67-10.14) compared with those attending the usual care clinic.

CONCLUSION

Antidepressants were widely prescribed following screening in primary care, but prescription patterns were in poor accord with WHO recommendations. The data suggest under-prescription for people with moderate/severe depression; over-prescription for people with mild depression or non-depression diagnoses; and over-prescription for people with no disorders. For all diagnoses adherence was low, especially in usual care clinics. To address these concerns, there is an urgent need to study and develop strategies in primary care practices to limit unnecessary antidepressant prescriptions, target prescription for those patients who clearly benefit, and to improve adherence to antidepressant treatment. ClinicalTrials.gov Identifier: NCT00446407.

Association of neighbourhood social and physical attributes with depression in older adults in Hong Kong: a multilevel analysis

Background

Previous studies investigating the independent effects of neighbourhood-level factors on depression are rare within the Asian context, especially in the elderly population.

Methods

Data for 29 099 older adults aged 65 years or above who have received health examinations at elderly health centres in Hong Kong in 2008–2011 were analysed. Using multilevel regression modelling, the cross-sectional associations of neighbourhood social attributes (neighbourhood poverty, ethnic minority, residential stability and elderly concentration) and physical (built) attributes (recreational services and walkability) with depression outcomes (depressive symptoms and depression) after adjusting for individual-level characteristics were investigated. Gender interaction effects were also examined.

Results

Neighbourhood poverty was associated with both depressive symptoms and depression in the elderly. Neighbourhood elderly concentration, recreational services and walkability were associated with fewer depressive symptoms. The association between neighbourhood poverty and elderly depressive symptoms was found in women only and not in men.

Conclusion

Policies aimed at reducing neighbourhood poverty, increasing access to recreational services and enhancing walkability might be effective strategies to prevent depression in older adults in the urban settings.

Antidepressant use in older inpatients: current situation and application of the revised STOPP criteria

Objectives

Antidepressant use increases as age rises. Moreover, older patients are more sensitive to side effects and drug interactions. This descriptive study aims to map antidepressant use among patients at the geriatrics department of a university hospital and to evaluate whether prescribing happens in an evidence-based manner.

Methods

Patients aged 75 years and over, admitted to the geriatrics department of the Middelheim Hospital in Antwerp between February and July 2017 were included. We checked whether they took antidepressants, which types and doses were prescribed, who prescribed the antidepressants, and whether prescribing was in concordance with the revised STOPP (Screening Tool of Older People's Prescriptions) criteria.

Results

Out of the 239 included patients, 61 were found to use antidepressants, with depression being the most important indication. General practitioners appeared to be the most frequent prescribers. Trazodone was the most prescribed antidepressant and was often used for sleeping disorders. Antidepressants were taken longer than recommended in almost one out of five cases. Patients with diabetes and renal insufficiency were prescribed antidepressants less frequently. Only 2.8% of the study participants were prescribed antidepressants for anxiety disorders.

Conclusion

We can conclude that prescription of antidepressants in older patients at the geriatrics department is often not evidence based. Clear guidelines may offer a solution; therefore more studies are needed on antidepressant use in older patients.

The use of antidepressants in Belgian nursing homes: focus on indications and dosages in the PHEBE study

BACKGROUND

Since antidepressants are prescribed for multiple indications, the use of an antidepressant cannot be equated with a diagnosis of depression.

OBJECTIVE

The objective of this study was to examine the quality of antidepressant prescribing in Belgian nursing homes, with a critical evaluation of indications and dosages, to see whether depression was appropriately treated in terms of drug choice, the indications for which antidepressants were being prescribed and whether there was underdosing.

METHODS

This analysis was based on data obtained in the Prescribing in Homes for the Elderly in Belgium (PHEBE) study, a cross-sectional, descriptive study of a representative, stratified, random sample of 1,730 residents from 76 Belgian nursing homes. The PHEBE study investigated overall drug utilization in Belgian nursing homes in 2006. Clinical and medication data for the present study were obtained from this study. A 28-item checklist of clinical conditions was designed ad hoc for the PHEBE study and sent to the residents' general practitioners (GPs) to collect clinical information. We copied the residents' medication charts, classified the drugs using the Anatomical Therapeutic Chemical (ATC) classification system codes and transferred the drug names and dosages into a database. Information on indications was retrospectively obtained from the GPs, so that we could link the indication to each medication. Minimum effective doses (MEDs) of antidepressants to treat major depression were obtained from the literature to assess underdosing.

RESULTS

The overall use of antidepressants in nursing homes was 39.5 % (95 % CI 37.2, 41.8). The physicians classified 34.2 % (95 % CI 32.0, 36.4) of the residents as having depression, and 80.9 % of these patients were treated with an antidepressant. Indications among the single antidepressant users (n = 551) were depression (66.2 %), insomnia (13.4 %), anxiety (6.2 %) and neuropathic pain (1.6 %). In the indication of depression, 74.8 % used a selective serotonin reuptake inhibitor (SSRI), predominantly citalopram, sertraline and escitalopram. Venlafaxine was used by 10.7 % of the residents. Dosages for these antidepressants were equal to or higher than the MED. But when trazodone, amitriptyline or mirtazapine were used to treat depression, respectively, 92.3, 55.5 and 44.5 % of prescribed dosages were below the MED. In the indication of insomnia, most of the time, trazodone (90.5 %) or mirtazapine (5.4 %) were used, and in lower dosages than those required for depression treatment (<MED). Tricyclic antidepressants were predominantly used for the treatment of neuropathic pain and were also used at lower dosages. Of all the residents receiving a medication for anxiety, only 13.9 % received an antidepressant (mostly an SSRI), and the remaining received a benzodiazepine.

CONCLUSIONS

The number one indication for the use of an antidepressant was depression. Within this indication, mostly the recommended SSRIs were used, in dosages equal to or higher than the MED. Furthermore, we noticed that there was substantial use of sedative antidepressants for insomnia and that the physicians preferred to prescribe benzodiazepines over the recommended SSRIs to treat anxiety chronically.

Inappropriate use of psychotropic drugs in older individuals: implications for practice

Frailty at old age and institutionalization in nursing homes are often associated with multiple chronic diseases (multimorbidity) requiring multiple medications (polypharmacy). Among these chronic conditions, mental health problems (e.g., dementia, depression and insomnia) are common. Psychotropic drugs are frequently used as a treatment approach for these conditions, and the prevalence of their use is high among community-dwelling older adults, but even higher in nursing homes. Furthermore, within the problem of polypharmacy and inappropriate prescribing, psychotropic drugs (defined in this article as antipsychotics, benzodiazepines and antidepressants) constitute a significant proportion. The use of psychotropics in older adults remains controversial given the risk of adverse effects, in contrast to the limited effectiveness. Guidelines advise a thorough risk–benefit analysis before the initiation of psychotropics, in addition to time-limited use and discontinuation. In the future, serious efforts should be undertaken to tackle the burden of inappropriate psychotropic prescribing in older adults by incorporating a multidisciplinary approach and by offering credible alternatives.

Neighborhood characteristics and depressive mood among older adults: an integrative review

BACKGROUND

There is growing evidence that neighborhood environments are related to depressive mood in the general population. Older adults may be even more vulnerable to neighborhood factors than other adults. The aim of this paper is to review empirical findings on the relationships between neighborhood characteristics and depressive mood among older adults.

METHODS

A search of the literature was undertaken in PsycINFO and MEDLINE.

RESULTS

Nineteen studies were identified. Study designs were most often cross-sectional, included large sample sizes, and controlled for major individual characteristics. Mediational effects were not investigated. Statistical analysis strategies often included multilevel models. Spatial delimitations of neighborhood of residence were usually based on administrative and statistical spatial boundaries. Six neighborhood characteristics were assessed most often: neighborhood socioeconomic disadvantage, neighborhood poverty, affluence, racial/ethnic composition, residential stability, and elderly concentration. Selected neighborhood characteristics were associated with depressive mood after adjusting for individual variables. These associations were generally theoretically meaningful.

CONCLUSIONS

Neighborhood variables seem to make a unique and significant contribution to the understanding of depressive mood among older adults. However, few studies investigated these associations and replication of results is needed. Several substantive neighborhood variables have been ignored or neglected in the literature. The implications of neighborhood effects for knowledge advancement and public health interventions remain unclear. Recommendations for future research are discussed.

Geriatric drug utilisation of psychotropics in Belgian nursing homes

OBJECTIVE

To determine the prevalence of psychotropic drug use in Belgian nursing homes, in relation to residents' and institutional characteristics.

METHODS

The PHEBE project (Prescribing in Homes for the Elderly in Belgium, 2005) was a cross-sectional study, investigating drug use in 76 nursing homes. Psychotropics were categorised into antidepressants, antipsychotics, benzodiazepines and anti-dementia drugs using the ATC classification.

RESULTS

Residents' mean age (n=1730) was 85 (SD: 8) years and 78% were female. The overall prevalence of psychotropic drug use among nursing home residents was 79%. Benzodiazepines were used by 54% and antipsychotics by 33% of all residents. Residents received a higher number of antipsychotics ( p<0.001) but fewer antidepressants (and other medicines) with increasing severity of dementia. Antidepressants were prescribed in 40% of which 2/3 was indicated for depression and 1/3 for insomnia. Anti-dementia drugs were used by 8%. Institutional characteristics showed no relationship with psychotropic drug use, except for a lower use when medication was dispensed by a hospital pharmacist (p=0.001).

CONCLUSION

As in other European countries, the prevalence of psychotropic utilisation in Belgian nursing homes is exceedingly high, with excessive duplicate use. Guidelines, education and clinical practice recommendations focusing on initiation, reassessment and withdrawal of psychotropic therapy, are needed.

The use of selective serotonin reuptake inhibitors in elderly patients

Depression is common among the elderly, and several factors need to be taken into account in selecting the appropriate antidepressant in this age group. Various physiologic changes occur in individuals as they age, potentially leading to changes in the pharmacodynamic and pharmacokinetic properties of drugs in elderly individuals. The efficacy of various medications, their side-effect profiles, and the potential for drug-drug interactions may differ in older patients compared to younger ones. The selective serotonin reuptake inhibitors (SSRIs), which are seen as being among the first-line agents for treatment of depression in elderly patients, have been shown to be effective but carry with them side effects and drug-drug interactions that warrant special attention when these medications are prescribed to older individuals. This review focuses on the pharmacology of SSRIs in elderly patients and on practical issues related to using these medications.

Tense prescriptions? Alzheimer medications and the anthropology of uncertainty

This article discusses the two major groups of Alzheimer medications, which are hotly debated in the specialized literature because of their doubtful efficacy. Examining this issue under the rubric of an ;anthropology of uncertainty,' this article seeks to address the question: how do doctors prescribe medications given tensions created by uncertainty? A partial answer is drawn from research conducted in Brazil with local psychogeriatricians, which has documented a high degree of certainty regarding Alzheimer drugs and their benefits. I argue that one reason for this certainty is that ;efficacy' has become increasingly non-specific in Alzheimer's disease through the broadening of outcome measures in clinical trials. While such measures previously focused on cognitive symptoms, they now encompass concepts such as functionality, quality of life and activities of daily living. The certainty of the Brazilian psychogeriatricians is further buttressed by three interacting elements: (i) the influence of the pharmaceutical industry; (ii) long-standing arguments for including non-cognitive symptoms in dementia care and research; and (iii) a specific discourse found in geriatrics and gerontology, which recognizes ;the person beyond cognition.'

Recommendations for treating depression in community-based older adults

OBJECTIVE

To present recommendations for community-based treatment of late-life depression to public health and aging networks.

METHODS

An expert panel of mental health and public health researchers and community-based practitioners in aging was convened in April 2006 to form consensus-based recommendations. When making recommendations, panelists considered feasibility and appropriateness for community-based delivery, as well as strength of evidence on program effectiveness from a systematic literature review of articles published through 2005.

RESULTS

The expert panel strongly recommended depression care management-modeled interventions delivered at home or at primary care clinics. The panel recommended individual cognitive behavioral therapy. Interventions not recommended as primary treatments for late-life depression included education and skills training, comprehensive geriatric health evaluation programs, exercise, and physical rehabilitation/occupational therapy. There was insufficient evidence for making recommendations for several intervention categories, including group psychotherapy and psychotherapies other than cognitive behavioral therapy.

CONCLUSIONS

This interdisciplinary expert panel determined that recommended interventions should be disseminated throughout the public health and aging networks, while acknowledging the challenges and obstacles involved. Interventions that were not recommended or had insufficient evidence often did not treat depression primarily and/or did not include a clinically depressed sample while attempting to establish efficacy. These interventions may provide other benefits, but should not be presumed to effectively treat depression by themselves. Panelists also identified primary prevention of depression as a much under-studied area. These findings should aid individual clinicians as well as public health decision makers in the delivery of population-based mental health services in diverse community settings.

Practical considerations for the treatment of elderly patients with migraine

Treatment of migraine presents special problems in the elderly. Co-morbid diseases may prohibit the use of some medications. Moreover, even when these contraindications do not exist, older patients are more likely than younger ones to develop adverse events. Managing older migraine patients, therefore, necessitates particular caution, including taking into account possible pharmacological interactions associated with the greater use of drugs for concomitant diseases in the elderly. Paracetamol (acetaminophen) is the safest drug for symptomatic treatment of migraine in the elderly. Use of selective serotonin 5-HT(1B/1D) receptor agonists ('triptans') is not recommended, even in the absence of cardiovascular or cerebrovascular risk, and NSAID use should be limited because of potential gastrointestinal adverse effects. Prophylactic treatments include antidepressants, beta-adrenoceptor antagonists, calcium channel antagonists and antiepileptics. Selection of a drug from one of these classes should be dictated by the patient's co-morbidities. Beta-adrenoceptor antagonists are appropriate in patients with hypertension but are contraindicated in those with chronic obstructive pulmonary disease, diabetes mellitus, heart failure and peripheral vascular disease. Use of antidepressants in low doses is, in general, well tolerated by elderly people and as effective, overall, as in young adults. This approach is preferred in patients with concomitant mood disorders. However, prostatism, glaucoma and heart disease make the use of tricyclic antidepressants more difficult. Fewer efficacy data in the elderly are available for selective serotonin reuptake inhibitors, which can be tried in particular cases because of their good tolerability profile. Calcium channel antagonists are contraindicated in patients with hypotension, heart failure, atrioventricular block, Parkinson's disease or depression (flunarizine), and in those taking beta-adrenoceptor antagonists and monoamine oxidase inhibitors (verapamil). Antiepileptic drug use should be limited to migraine with high frequency of attacks and refractoriness to other treatments. Promising additional strategies include ACE inhibitors and angiotensin II type 1 receptor antagonists because of their effectiveness and good tolerability in patients with migraine, particularly in those with hypertension. Because of its favourable compliance and safety profile, botulinum toxin type A can be considered an alternative treatment in elderly migraine patients who have not responded to other currently available migraine prophylactic agents. Pharmacological treatment of migraine poses special problems in regard to both symptomatic and prophylactic treatment. Contraindications to triptan use, adverse effects of NSAIDs, and unwanted reactions to some antiemetics reduce the list of drugs available for the treatment of migraine attacks in elderly patients. The choice of prophylactic treatment (beta-adrenoceptor antagonists, calcium channel antagonists, antiepileptics, and more recently, some antihypertensive drugs) is influenced by co-morbidities and should be directed at those drugs that are believed to have fewer adverse effects and a better safety profile. Unfortunately, for most of these drugs, efficacy studies are lacking in the elderly.

Course and outcomes of depression in the elderly

Major depressive disorder is a potentially debilitating condition that often is unrecognized or undertreated in the elderly. Even when aggressively treated, the course of geriatric depression can be severe. There is growing evidence that suggests that late-life depression may carry a higher illness burden than depression with onset earlier in life, and that severity is linked to medical and psychiatric comorbidity. Data continue to accumulate in support of various treatment modalities, including medication, electroconvulsive therapy, and psychotherapy. Given the increased risk of adverse outcomes associated with geriatric depression, such as dementia and suicide, it is essential that future investigations continue to build on the evidence base supporting improved diagnosis and treatment of this complex disorder.