I also find that a nap helps when I lose energy. But then, I was taking naps on weekend before I was diagnosed.
My dosage has crept up, but I recently worked on a different scheme. We reduced the dosage to 36 Concerta in the morning and added 10 Biphentin (i.e. not slow release) with lunch. That has helped.
When I discussed dosage with my doctor, she said if you want to know what the medication is doing for you, stop taking it for a day and observe the differences. That was very helpful in separating the effect of the drug from other things I’m doing.REPORT ABUSE