Drugs with anticholinergic action are widely prescribed in the elderly population due to their potential clinical benefits. However, these benefits are limited by adverse effects which may be serious in particular circumstances. This review presents different aspects of the use of anticholinergics in old age with a focus in psychogeriatric patients. We critically review published data on benefits and disadvantages of anticholinergics, which are often controversial. Prevalence, pathophysiology and measurement methods of the anticholinergic action of drugs are discussed. We also present the most important drawbacks resulting from its use, including effects on cognition in healthy and cognitively impaired people, in aged schizophrenia patients, emergence of delirium and psychiatric symptoms, influence in functionality, hospitalization, institutionalization and mortality, and the potential benefits and limitations of their discontinuation. Finally, we suggest practical recommendations for the safe use of anticholinergics in clinical conditions affecting elderly patients, such as dementia, schizophrenia and acute hallucinatory episodes, depression, anxiety, Parkinson's disease, cardiovascular conditions and urinary incontinence.
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http://dx.doi.org/10.3389/fnins.2019.01309 | DOI Listing |
J Korean Med Sci
January 2025
Division of Cardiology, Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea.
Background: The ionic mechanism underlying Brugada syndrome (BrS) arises from an imbalance in transient outward current flow between the epicardium and endocardium. Previous studies report that artemisinin, originally derived from a Chinese herb for antimalarial use, inhibits the Ito current in canines. In a prior study, we showed the antiarrhythmic effects of artemisinin in BrS wedge preparation models.
View Article and Find Full Text PDFArch Razi Inst
June 2024
Medical Plants Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran.
In the present study, the mechanisms involved in scopolamine-induced memory impairment have been investigated. The molecular events that take place during memory mostly include mechanisms that are seen in the acquisition phase. Results showed that one of the mechanisms of memory destruction caused by scopolamine, in addition to weakening the cholinergic system, is the indirect effect of scopolamine on other neurotransmitter systems, including the glutamatergic system.
View Article and Find Full Text PDFGlob Health Action
December 2024
Global Health Section, Department of Public Health, University of Copenhagen, Copenhagen K, Denmark.
Intentional and unintentional pesticide poisoning is an important public health problem, especially in low- and middle-income countries. Individuals who have been exposed to toxic pesticides, particularly organophosphorus insecticides, need early treatment. Atropine autoinjector devices offer a potential solution, allowing storage of effective treatment near agricultural workers' fields and homes that could be reached within minutes by the worker or fellow villagers to provide first-line emergency care.
View Article and Find Full Text PDFJ Pharmacol Sci
December 2024
Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Toho University, Miyama 2-2-1, Funabashi-City, Chiba, 274-8510, Japan.
We investigated the inhibitory effects of 32 antidepressants on [H]N-methylscopolamine ([H]NMS)-specific binding in the mouse cerebral neocortex to determine which antidepressants should be recommended for patients with Alzheimer's disease (AD). Of those tested, nine antidepressants (10 M) exhibited less inhibitory effect on [H]NMS-specific binding (<35%): tianeptine (a tricyclic); trazodone (a serotonin 5-HT blocker); sulpiride (a dopamine D blocker); fluvoxamine (a selective serotonin reuptake inhibitor (RI)); milnacipran, levomilnacipran, venlafaxine, and desvenlafaxine (serotonin and noradrenaline RIs); and bupropion (a noradrenaline and dopamine RI). Therefore, these antidepressants show little anticholinergic effect in the brain and are recommended for use in patients with AD.
View Article and Find Full Text PDFElife
November 2024
Nuffield Department of Clinical Neuroscience, University of Oxford, Oxford, United Kingdom.
Motivation depends on dopamine, but might be modulated by acetylcholine which influences dopamine release in the striatum, and amplifies motivation in animal studies. A corresponding effect in humans would be important clinically, since anticholinergic drugs are frequently used in Parkinson's disease, a condition that can also disrupt motivation. Reward and dopamine make us more ready to respond, as indexed by reaction times (RT), and move faster, sometimes termed vigour.
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