This is how I previously answered a similar question: “You do not ‘automatically’ lose your driving licence simply because you are diagnosed with Parkinson’s disease. And your ability to drive can actually improve with Parkinson’s medication, at least in terms of improved mobility in terms of speed and agility. In the longer term (over several years), driving ability can sometimes deteriorate; in such cases, the most common effect is that reaction times become slightly slower.” /Dag Nyholm
