I took 5mg the 1st week, then 10mg the 2nd week. No issues with side effects, just slight stomach discomfort . I take it in the evening. When I went to take 20mg the 3rd week, I woke in the middle of the night feeling horrible. I wanted to throw-up I felt so bad, but couldn't. I felt horrible the entire next day. My whole body ached. I took 5mg that evening, then went back to 10mg thereafter. I'm scared to try to 20mg again. Is anyone at 10mg and satisfied, or do I have to get up to 20mg to get relief? I also take 40mg of Vyvanse in the morning.