Assessing the Impact of Calcium Channel Blockers on COGnitive Function in the Very Elderly (AI-COG)

Older adults are at increased risk of high blood pressure and cognitive decline. High blood pressure itself also increases risk of cognitive decline. A particular type of blood pressure lowering drug (a calcium channel blocker(CCB)) may lower risk of dementia in younger adults but there is no clear evidence of it's impact in those \>=80. It is important that we know whether CCB use impacts on cognitive function in this age group. This study will examine the impact of antihypertensives on change in cognitive function with a particular focus on CCBs.