The same thing has been reported with Rexahn, which I have posted about here before. Initially used to treat depression, seems to have unforseen benefits on PD symptoms. You can look it up on the forum here, also google it for even more info. I think the mechanism of action may have something to do with simply balancing the neurotransmitters...if a drug helps with depression (which relates to not just dopamine but serotonin and even others I'm not aware of) then anything that helps balance things out for one condition is bound to help other conditions as well. Just my opinion, which is why I'm watching Rexahn, and now this one as well.