My son has alot of trouble getting to sleep and if I let him sleep in he would sleep until 11am in the morning. When we wake him to get up for school he is in a dead sleep. We give him medication and he goes back to sleep and then naturally wakes after 40 minutes. He gets very tired though and we have found he need to catch up on his sleep on the weekend.
Our 16 year old daughter has just gone from concerta to quick release ritalin and is finding getting to sleep alot easlier. Her last dose of meds is at 4pm so when she is wanting to go to sleep the meds are well and truly wearing off.
I'm not on regular Ritalin.. but Focalin XR is in the Ritalin family. I do have a terrible time waking up in the mornings... BUT- I've ALWAYS been that way, so it's not a change for me, it just hasn't gotten any better.