According to Dr. Rahul Aggarwal, a cardiologist at Palm Beach Gardens Medical Center, if left untreated
Research team with ChristianBenedikt, an adjunct professor in the Department of Neurology at Uppsala University, has followed 1,000 elderly Swedish men for 24 years. It turned out that the likelihood of developing dementia is 1.64 times higher in those men whose blood pressure became high at night compared to those in whom it was within the normal range.

Additionally, as the Alzheimer's Society notes,Long-term studies have shown that high blood pressure in middle-aged people – this is the main factor that increases their risk of developing dementia in old age, especially vascular dementia.
In 2013, experts found that older people with hypertension were more likely to have biomarkers for Alzheimer's disease.
News stories cannot be equated with a doctor's prescription. Before making a decision, consult a specialist.