Abstract
Parkinsonism is a frequently encountered clinical feature in patients with bipolar disorder (BD). It is usually attributed to side effects of medication, but can also be a result of concomitant cerebrovascular disease and even an emerging idiopathic Parkinson’s disease (PD). In a recent meta‐analysis by Faustino et al published in JAMA Neurology, the association of BD with a later diagnosis of PD was assessed 1. Four cohort studies and three cross‐sectional studies reporting data on the likelihood of developing PD in BD versus non‐BD populations were included, with a total of 4.374.211 participants overall.