FWIW: as a bona fide user of various anti-parkinsonian medications for their intended purpose, I can say with a degree of confidence that the speculation on cog

FWIW: as a bona fide user of various anti-parkinsonian medications for their intended purpose, I can say with a degree of confidence that the speculation on cognitive impact (and impairment) is very plausible - and that the article is factually correct on the side effects in a Parkinson’s context. God knows what they would do to a brain with a “normal” dopamine level. It’s also worth noting (and quite frankly pretty harsh when you eventually realise) that the affected brain has massive difficulty recognising its own altered cognition and perceives its distorted interpretations and consequent chains of response as perfectly natural and justified. Not drawing any specific conclusions on the particular assertions in the article, but IMHO the interpretation is certainly plausible given the apparent drugs involved.