Not sure if you still need help... But I get the feeling of being tired.....It last through most of the day until I get home at about 5pm.I feel awake and normal for a few hours and then go to bed at a normal time for me. In the morning I take the pill with Diet Coke (60mls) it's my preferred drink that also gives me a little hit of caffeine. During the day I have bright lights in my office and keep drinking water. Lunch is when I have my coffee, to help me through the day. Also make sure that you are getting enough protein. I find it helps wake me up and keep me awake along with giving me energy.