This is not true. The causes of dyskinesia are mostly unknown, although certain triggers are known (such high serum l-dopa levels in advanced PD). It is also known that Young Onset PDers have a much greater "risk" of developing dyskinesias. Why? No one knows. Terry Brennan 39/+9 ---------- From: PARKINSN: Parkinson's Disease - Information Exchange Network[SMTP:PARKINSN@ listserv.utoronto.ca] Sent: Thursday, November 07, 1996 10:20 AM To: Multiple recipients of list PARKINSN Subject: Re: new member/questions The use of sinemet CR leads to dyskenisa.