Psychiatric effects of Parkinson's drugs

@Marisa H, that was a great explanation for the impact of L-DOPA and it's connection to psychosis. As for the question about an evaluation if they should commit a crime, @Affra Iftikhar, this will partly depend on their jurisdiction. In many jurisdictions (including my own), an individual can be acquitted by reason of insanity (or mental disease or defect) if their criminal responsibility was impaired at the time of the alleged offenses by involuntary intoxication/medication. In other words, if an individual is taking their medication as prescribed and is simply following doctor's orders, the negative effects of that medication should not be held against the individual if it leads to the commission of a crime. Although there are some nuances to this and how it is implemented, the short summary is that such individuals can (in many states in the US) be acquitted because it was medication-induced psychiatric impairments which impaired their criminal responsibility.

@Nina M. Hello Nina!

Thank you for that new piece of information. Let's see what other answers we get :)