There are two Sinemet CR tablets - one is 50/200 scored so you can break it into two CR 25/100. A fairly new tablet on the scene is a CR 25/100 which is unscored. It is called a CR Junior by some. It is not meant to be halved but I halve it on occasion and it works fine - lasts about a half to one hour longer than regular Sinemet of the same strength and without that long lag time of the whole "Junior." Barbara Yacos