I absolutely always feel sluggish and exhausted in the afternoon. It happens on weekends and weekdays. Regardless of what I eat for lunch or if I eat lunch at all. It happens if I take my stimulan in the morning (I have ADHD) or if I do not. Does anyone else experience this? Usually my energy comes back at least a little bit in the evening. But it is always hard for me to get thru afternoons at work.