Background Cognitive decline is common in older people. Numerous studies point to the detrimental impact of polypharmacy and inappropriate medication on older people’s cognitive function. Here we aim to systematically review evidence on the impact of medication optimisation and drug interventions on cognitive function in older adults. Methods A systematic review was performed using MEDLINE and Web of Science on May 2021. Only randomised controlled trials (RCTs) addressing the impact of medication optimisation or pharmacological interventions on quantitative measures of cognitive function in older adults (aged > 65 years) were included. Single-drug interventions (e.g., on drugs for dementia) were excluded. The quality of the studies was assessed by using the Jadad score. Results Thirteen studies met the inclusion criteria. In five studies a positive impact of the intervention on metric measures of cognitive function was observed. Only one study showed a significant improvement of cognitive function by medication optimisation. The remaining four positive studies tested methylphenidate, selective oestrogen receptor modulators, folic acid and antipsychotics. The mean Jadad score was low (2.7).
Conclusion This systematic review identified a small number of heterogenous RCTs investigating the impact of medication optimisation or pharmacological interventions on cognitive function. Five trials showed a positive impact on at least one aspect of cognitive function, with comprehensive medication optimisation not being more successful than focused drug interventions. More prospective trials are needed to specifically assess ways of limiting the negative impact of certain medication in particular and polypharmacy in general on cognitive function in older patients.@en

The article Current evidence on the impact of medication optimization or pharmacological interventions on frailty or aspects of frailty: a systematic review of randomized controlled trials, written by Farhad Pazan, Mirko Petrovic, Antonio Cherubini, Graziano Onder, Alfonso J. Cruz-Jentoft, Michael Denkinger, Tischa J. M. van der Cammen, Jennifer M. Stevenson, Kinda Ibrahim, Chakravarthi Rajkumar, Marit Stordal Bakken, Jean-Pierre Baeyens, Peter Crome, Thomas Frühwald, Paul Gallaghar, Adalsteinn Guðmundsson, Wilma Knol, Denis O’Mahony, Alberto Pilotto, Elina Rönnemaa, José Antonio Serra-Rexach, George Soulis, Rob J. van Marum, Gijsbertus Ziere, Alpana Mair, Heinrich Burkhardt, Agnieszka Neumann-Podczaska, Katarzyna Wieczorowska- Tobis, Marilia Andreia Fernandes, Heidi Gruner, Dhayana Dallmeier, Jean-Baptiste Beuscart, Nathalie van der Velde and Martin Wehling, was originally published electronically on the publisher’s internet portal on 07 August 2020 without open access. With the author(s)’ decision to opt for Open Choice the copyright of the article changed on 14 May 2021 to

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Background: Frailty and adverse drug effects are linked in the fact that polypharmacy is correlated with the severity of frailty; however, a causal relation has not been proven in older people with clinically manifest frailty. Methods: A literature search was performed in Medline to detect prospective randomized controlled trials (RCTs) testing the effects of pharmacological interventions or medication optimization in older frail adults on comprehensive frailty scores or partial aspects of frailty that were published from January 1998 to October 2019. Results: Twenty-five studies were identified, 4 on comprehensive frailty scores and 21 on aspects of frailty. Two trials on comprehensive frailty scores showed positive results on frailty although the contribution of medication review in a multidimensional approach was unclear. In the studies on aspects related to frailty, ten individual drug interventions showed improvement in physical performance, muscle strength or body composition utilizing alfacalcidol, teriparatide, piroxicam, testosterone, recombinant human chorionic gonadotropin, or capromorelin. There were no studies examining negative effects of drugs on frailty. Conclusion: So far, data on a causal relationship between drugs and frailty are inconclusive or related to single-drug interventions on partial aspects of frailty. There is a clear need for RCTs on this topic that should be based on a comprehensive, internationally consistent and thus reproducible concept of frailty assessment.

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Purpose: To investigate: (1) the cross-sectional association between polypharmacy, hyperpolypharmacy and presence of prefrailty or frailty; (2) the risk of incident prefrailty or frailty in persons with polypharmacy, and vice versa. Methods: A systematic review and meta-analysis was performed according to PRISMA guidelines. We searched PubMed, Web of Science, and Embase from 01/01/1998 to 5/2/2018. Pooled estimates were obtained through random effect models and Mantel–Haenszel weighting. Homogeneity was assessed with the I ² statistic and publication bias with Egger’s and Begg’s tests. Results: Thirty-seven studies were included. The pooled proportion of polypharmacy in persons with prefrailty and frailty was 47% (95% CI 33–61) and 59% (95% CI 42–76), respectively. Increased odds ratio of polypharmacy were seen for prefrail (pooled OR = 1.52; 95% CI 1.32–1.79) and frail persons (pooled OR = 2.62, 95% CI 1.81–3.79). Hyperpolypharmacy was also increased in prefrail (OR = 1.95; 95% CI 1.41–2.70) and frail (OR = 6.57; 95% CI 9.57–10.48) persons compared to robust persons. Only seven longitudinal studies reported data on the risk of either incident prefrailty or frailty in persons with baseline polypharmacy. A significant higher odds of developing prefrailty was found in robust persons with polypharmacy (pooled OR = 1.30; 95% CI 1.12–1.51). We found no papers investigating polypharmacy incidence in persons with prefrailty/frailty. Conclusions: Polypharmacy is common in prefrail and frail persons, and these individuals are also more likely to be on extreme drug regimens, i.e. hyperpolypharmacy, than robust older persons. More research is needed to investigate the causal relationship between polypharmacy and frailty syndromes, thereby identifying ways to jointly reduce drug burden and prefrailty/frailty in these individuals. Prospero registration number: CRD42018104756.

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