I'm not sure about the sleep thing because some time ago (before takng Mirapex) I went thru a period of not sleepingfor quite a while. Then for some time slept quite well. However, when I started taking Meripex I again started my insomnia at night with short naps at odd times. I've tried to blame the Meripex but I have about decided it's the disease not the drugs. I have been taking Bayer PM for the best sleep as it also helps my stiff neck problem. I dislike taking drugs for everything, but I guess I should be thankful for them! Ruth Clark 67/9