I have been taking Ritalin sr for a long time now but last time my doctor wrote a script ,I got it filled before I notice it was reg. Ritalin. Because I already had it filled I have to deal with it this month and I HATE it. It is like a freaking roller coaster ride. I don't feel the other stuff but this stuff kinda hits me at once and then it is gone so I have been taking more than I suppose to. I ended giving it to my Mom to shell out everyday and I have been doing better. The other thing I hate is that when it comes out of my system I seem to get depressed. I don't have that problem with the SR. I used to get depressed a lot when it seemed that I was worthless but now I hardly ever get it because my life is so much better and I feel in control of my mind and will. My doctor told me that it was the same drug but I just don't know. I don't like it and it makes me feel like a drug addict . Does anyone else have this problem? or am I just weird. I only have a 10 days till my next prescription and believe you me I will be checking from here on out before I leave the office.