This might be useless information but I was on Mylan Sinemet CR 50/200 prior to switching over to Stalevo..But the reason I say it might be useless info is because this was about 3-4 years ago that I switched over to Stalevo because the CR wasn't working anymore..Things might have changed since then..I was getting it from CVS at the time..Also the Mylan generic worked very good..I was on the brand name when Bristol Myers was making 50/200 CR, and the Mylan generic version was pretty damn close to being as effective as the brand name CR