I am a 69 yrs old US Army retiree and have been diagnoised w/ PD for 4 yrs now. I have been on Carbidopa/Levo for 3yrs (Presently on 2 pills 3x a day) and am having difficulty with involuntary lip-sucking/tongue movements causing my speech to decline rapidly. The dosage has been reduced on a couple of occasions but the dyskenisia continues. Is there any known treatment for this condition? Thank you...