State of confusion: sorting out a complex medication regimen for a 79-year-old woman

Systematic review to inform the development of a community pharmacy-based intervention for people affected by dementia

OBJECTIVES

People living with dementia (PWD) frequently receive medicine regularly from their community pharmacy, thus providing an opportunity to address either directly or through a carer any unmet medicine-related needs. The aim of this systematic review was to identify, describe, and evaluate the quality of the research for dementia-specific pharmacy-based interventions with potential for delivery through community pharmacy. This would inform the design of future services and associated trials.

KEY FINDINGS

The systematic review process identified 29 studies. Interventions were categorised as medication review, targeted medicine intervention, education, memory screening and miscellaneous. Five studies were set in community pharmacy. Interventions frequently targeted antipsychotics, benzodiazepines and anticholinergic medication. Twenty interventions were medicine-related. Eighteen studies were categorised as 'very low' quality, often due to small sample size.

SUMMARY

The review identified a range of interventions, which could be delivered through community pharmacy, and potentially benefit PWD. Developing appropriate and efficient training and working in multi-disciplinary teams were identified as necessary for effectiveness. Further research is needed to identify which service elements are likely to be acceptable to both patients and practitioners as well as the barriers and enablers to their implementation.

Association between prescribing of anticholinergic medications and incident delirium: a cohort study

OBJECTIVES

To describe the association between anticholinergic medications and incident delirium in hospitalized older adults with cognitive impairment and to test the hypothesis that anticholinergic medications would increase the risk of incident delirium.

DESIGN

Observational cohort study.

SETTING

Urban public hospital in Indianapolis, Indiana.

PARTICIPANTS

One hundred forty-seven participants aged 65 and older with cognitive impairment who screened negative for delirium at the time of admission to a general medical ward.

MEASUREMENTS

Cognitive function at the time of admission was assessed using the Short Portable Mental Status Questionnaire (SPMSQ). Anticholinergic medication orders between the time of admission and the final delirium assessment were evaluated. Anticholinergic medication orders were identified using the Anticholinergic Cognitive Burden Scale. Delirium was assessed using the Confusion Assessment Method.

RESULTS

Fifty-seven percent of the cohort received at least one order for possible anticholinergic medications, and 28% received at least one order for definite anticholinergic medications. The incident rate for delirium was 22% of the entire cohort. After adjusting for age, sex, race, baseline SPMSQ score, and Charlson Comorbidity Index, the odds ratio (OR) for developing delirium in those with orders for possible anticholinergic medications was 0.33 (95% confidence interval (CI) = 0.10-1.03). The OR for developing delirium among those with orders for definite anticholinergic medications was 0.43 (95% CI = 0.11-1.63).

CONCLUSION

The results did not support the hypothesis that prescription of anticholinergic medications increases the risk of incident delirium in hospitalized older adults with cognitive impairment. This relationship needs to be established using prospective study designs with medication dispensing data to improve the performance of predictive models of delirium.