I take Sinemet 125mg every 2 hours day and night. Once the Sinemet kicks in, I get a strong urge to sleep which I can not resist. This is okay for the night time because I can get 2-3 bouts of sleep. The problem is daytime sleep attacks which prevent me from doing anything useful while I am ON. I tried stimulants and coffee with no luck. What do you do to stay awake when you want to?