http://www.medicalnewstoday.com/articles/175793.php"Research published today on bmj.com reports that angiotensin receptor blockers are associated with a reduced risk of Alzheimer's disease and dementia. These drugs are normally used to treat high blood pressure and heart disease.
In addition, the study concludes that angiotensin receptor blockers appear to offer greater protection against Alzheimer's disease and dementia than other high blood pressure and heart disease medication.
A growing number of people are threatened by dementia (including Alzheimer's disease) as they get older. This has important economic implications since individuals who suffer from either disease can spend long periods of time in nursing homes.
...
The findings indicate that the group on angiotensin receptor blockers was significantly less likely to develop Alzheimer's disease or dementia. In addition, they reveal that angiotensin receptor blockers have an additive effect when used in combination with another type of high blood pressure drug (ACE inhibitors). In fact, individuals with existing Alzheimer's disease or dementia who took both medicines were less likely to die early or be admitted to nursing homes.
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A bit of a surprise, but a lead toward further research, anyway.