Older class of type 2 diabetes drugs, glitazones, linked to 22% reduction in dementia risk, study indicates. Another drug appears to elevate the risk by 12%.
The results, Tang and colleagues say,"add substantially to the literature concerning the effects of [glucose-lowering medications] on dementia where previous findings have been inconsistent. Studies with a follow-up time of less than 3 years have mainly reported null associations, while studies with longer a follow-up time typically yielded protective findings. With a mean follow-up time of 6.8 years, we had a sufficient duration to detect treatment differences.
The findings regarding TZDs, also known as glitazones, are in line with existing literature suggesting dementia protection with other drugs prescribed for type 2 diabetes that weren't examined in the current study, such as newer agents like glucagon-like peptide-1 agonists and sodium-glucose cotransporter 2 inhibitors, Koychev said.
And, he pointed out that the study design limits attribution of causality."It is also important to note that people with type 2 diabetes do run a higher risk of both dementia and cognitive deficits and that these medications are only prescribed in these patients, so all this data is from this patient group rather than the general population."
"Double-blind and placebo-controlled clinical trials are needed to see whether the drug [TDZ] could help lower dementia risk in people with and without diabetes. Anyone with any questions about what treatments they are receiving should speak to their doctor," he told the UK Science Media Centre.
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