What do systematic reviews say?

Blood pressure‐lowering drugs (BPLDs) vs placebo or no treatment

Blood pressure‐lowering drugs (BPLDs) showed no clear difference in dementia compared with placebo or no treatment (high certainty).

• Blood pressure‐lowering treatment for preventing recurrent stroke, major vascular events, and dementia in patients… 2018 · Cochrane Headline outcomes only
  RR 0.88 [0.73, 1.06]
  2 studies · 6671 participants
  High