Hello, john947 --
I have been taking Amantadine approximately 12 years now. It can help counteract tremors and problems of gait. I have not experienced dyskinesia and therefore cannot comment on its effectiveness there. However, my first PD doctor prescribed Amantadine because trials had shown it to be effective in delaying the progress of the disease. I don't know whether to credit this drug, but after 18 years of PD, I am still in the first stage and have only very subtle symptoms that most people don't even notice. I also take Azilect (Rasagiline), which slows PD, plus Mirapex (Pramipexole) and a small dose of Sinemet.
Best of luck!