If you were on Sinemet (carbidop/levodopa) I would speculate that your pain is dystonia caused by long-term use of the medication. What you describe is the same pain that I get, except I often experience writhing pain, usually located in my upper arm (it feels llike it is an aching boone and strained surrounding muscles). I have never been on an agonist alone, because 16 years ago when I was first diagnosed, they added the agonist as adjunct theraoy later into the disease to help smooth out the on/off problems.

However, each individual is unique in the symptoms experienced. And pain is listed as one side effect of Mirapex (*** www.rxlist.com - search for Mirapex).

So these are my thoughts as to what is going on, but there are probably a zillion other possibilities. Best to you!
Peggy