my father has had parkinson's since 1996. in the past he was prescribed requip and did take it for some time. it had a terrible behavioural side effect which i've since read is not uncommon. it caused him to be very obsessive in his behaviour. he became fixated on things, unfortunately one of them was gambling. my father was 63 years old and he had never gambled in his life and after a visit to a casino on a vacation he became fixated on gambling. he also became fixated on other things most to do with around the house. much to my mother's detriment and alarm.
only after too much time and unfortunately too much effort required we convinced his medical team that this was not just him but that something was wrong. only then did we get rid of the requip. he now takes sinemet and the obsessive behaviours seem to have subsided.
i would suggest doing some more research online about requip and i would seriously consider if it's the right drug for him.