The manufacturer of the patch recommends that the patch be taken off after 9 hours. One of the reasons the doctor recommended it was so that we could get longer periods of time of effective medication. I think it loses effect with my son after about 10 hours.
We have not had any sleeping issues. As a matter of fact, he's been turning out his light earlier. I can't say for sure that he's falling asleep, but he's been able to settle down easier.
This weekend I gave him Concerta because we had 5 patches left and a doctor's appointment for Monday.
For my Daytrana, Medication patch for ADHD summary post, click here.