Recently, new research suggests that it is true! Certain medications that have been prescribed to lower blood pressure can slow dementia in seniors. ACE inhibitors showed a somewhat slower decline in memory and other mental skills than patients not on the drugs for some patients. Common medications in this class of drugs are commonly used medications such as captopril (Capoten), fosinopril (Monopril), lisinopril (Prinivil or Zestril), perindopril (Aceon), ramipril (Altace) and trandolapril (Mavik).
It should be noted that this research was not done as a clinical trial but rather an 'observational study' where older adults with Alzheimer's or other forms of dementia were being studied. About a quarter were on ACE inhibitors and they observed this benefit. It fuels discussion for further studies, however. And is much needed hope to those with Alzheimer's. Patients with newly started ACE inhibitors showed improvement in memory test scores.
https://www.medicinenet.com/script/main/art.asp?articlekey=172043
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