Ervin, Good question and not a simple answer. The pills are CR by virtue of their ability to disolve slowly and therefore they are absorbed more slowly. The physical characteristics of the tablet are important. I would presume that taking 2 25-100 tabs would not be absobed exactly with the same pattern as 1 50-200 but whether it would make a difference in how it acts - I do not know. Perhaps you can check with the drug company or possibly one of the pharmacists on the List eg Michel Margosis. Charlie ----- Original Message ----- From: Ervin McCarthy To: [log in to unmask] Sent: Saturday, January 22, 2000 10:44 AM Subject: Sinemet A question about Sinemet. The doctor gave me a prescription for 50/200CR four times a day. If I use up the remainder of my Sinemet 25/100CR two pills to equal the 50/200 C. R will that have the same effect? it may seem like a dumb question but I have a lot of 25/100CR left. Thanks for any information.