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Commonly prescribed drugs possibly tied to higher dementia risk


Jun. 26, 2019 CNN

A study published in the journal JAMA Internal Medicine on Monday suggests that the link is strongest for certain classes of anticholinergic drugs — particularly antidepressants such as paroxetine or amitriptyline, bladder antimuscarinics such as oxybutynin or tolterodine, antipsychotics such as chlorpromazine or olanzapine and antiepileptic drugs such as oxcarbazepine or carbamazepine.

Researchers wrote in the study that “there was nearly a 50% increased odds of dementia” associated with a total anticholinergic exposure of more than 1,095 daily doses within a 10-year period, which is equivalent to an older adult taking a strong anticholinergic medication daily for at least three years, compared with no exposure.”The study is important because it strengthens a growing body of evidence showing that strong anticholinergic drugs have long term associations with dementia risk,” said Carol Coupland, professor of medical statistics in primary care at the University of Nottingham in the United Kingdom and first author of the study.”It also highlights which types of anticholinergic drugs have the strongest associations. This is important information for physicians to know when considering whether to prescribe these drugs,” she said, adding “this is an observational study so no firm conclusions can be drawn about whether these anticholinergic drugs cause dementia.”She said that people taking these medications are advised not to stop them without consulting with their doctor first, as that could be harmful.

Click Read More to learn about the findings of the study.

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