# Association of antihypertensives and Parkinson’s disease in a primary care population matched for underlying diagnosis

## TL;DR

This study finds that antihypertensive medications, especially those affecting the renin-angiotensin system, are linked to a lower risk of Parkinson’s disease in a primary care population.

## Contribution

The study examines antihypertensive drug associations with Parkinson’s disease while accounting for underlying conditions.

## Key findings

- Antihypertensive medications overall were associated with a lower risk of Parkinson’s disease.
- The strongest negative association was observed for drugs acting on the renin–angiotensin–aldosterone system.
- Beta-blockers showed a positive association with PD, but only in younger patients with shorter treatment duration.

## Abstract

To examine the association of several antihypertensive medication classes with incidence of Parkinson’s disease (PD), taking into account possible underlying conditions.

In a case-control study based on a large primary care database and including 21,981 PD cases and 21,981 non-PD controls matched for age, sex, and possible treatment indications associations with different antihypertensive medication groups, including diuretics, betablockers, calcium channel blockers, angiotensin-converting enzyme inhibitors and angiotensin-II receptor-blockers and PD were examined.

Antihypertensive medications overall were associated with a lower risk of subsequent diagnosis of PD (OR: 0.94, 95% CI 0.90–0.97), with the negative association most significant for medications acting on the renin–angiotensin–aldosterone system. A positive association with diagnosis of PD was only seen for betablockers and restricted to those with relatively young age and not in those with longer treatment duration.

When taking into account underlying diagnoses, antihypertensive medications overall were associated with a reduced incidence of PD.