I tried Requip and then Mirapex and both made me tired and nauseous so I reluctantly got on Sinimet--I was worried about side effects. I will say the Sinimet works (my worst symtpom is Dystonia which causes my toes to curl and makes it hard to walk and the Sinimet pretty much takes care of that to the point that I can work out, etc.) I have noticed Sinimet makes me feel shakey and jittery sometimes and I do not like the way it feels but it is controllable and no one appears to notice (I have not disclosed my PD to many people). My doc says I can take a different RX for the shakiness but I really do not want to add another drug to the regimine at least until I really have to. BTW, I have been on Azilect since the begining. I think it contributes to me feeling drowsy sometimes but my doc says it may slow down progression of the disease so I am willing to deal with that.
Of course everyone with PD is different but hope that helps. Good luck.