Here is a new study investigating 5 ARI's effect on the dementia risk. For years fear mongers believed that finasteride can contribute to neurodegeneration by disruption of neurosteroidogenesis. Finally we have a good evidence that long term finasteride use is not associated with cognitive problems.
https://www.ncbi.nlm.nih.gov/pubmed/28716218
RESULTS:
New initiation of 5ARI medication was associated with an increased risk of dementia during the first (HR 2.18, 95% CI 2.01-2.35) and second (HR 1.52, 95% CI 1.39-1.67) year, however this risk was nonsignificant among the men with the longest exposure to 5ARIs (HR 1.06, 95% CI 0.98-1.14). There was no difference in the results between types of 5ARIs.
CONCLUSION:
As the strength of the association decreased with increased exposure, the higher risk seen in the initial two years likely represents the presentation and treatment of urinary symptoms which coexist with mild cognitive impairment and eventually progresses to a diagnosis of dementia.
https://www.ncbi.nlm.nih.gov/pubmed/28716218
RESULTS:
New initiation of 5ARI medication was associated with an increased risk of dementia during the first (HR 2.18, 95% CI 2.01-2.35) and second (HR 1.52, 95% CI 1.39-1.67) year, however this risk was nonsignificant among the men with the longest exposure to 5ARIs (HR 1.06, 95% CI 0.98-1.14). There was no difference in the results between types of 5ARIs.
CONCLUSION:
As the strength of the association decreased with increased exposure, the higher risk seen in the initial two years likely represents the presentation and treatment of urinary symptoms which coexist with mild cognitive impairment and eventually progresses to a diagnosis of dementia.
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