I started 20mg of vyvanse a week ago. I felt pretty good the first few days but now I don’t even know if it’s working. I just feel really tired. That being said, I am not getting much sleep as I have 7 month old twins who wake a lot at night. I remember having crashes on Adderall. I take vyvanse around 9 am and start getting really tired around 2-3pm. I am a pretty fast metabolizer, but this seems ridiculous. I was feeling hopeful but not really anymore. It’s been years since I was on an adhd drug. I can’t remember how long it took to work.

Also, without really trying I lost about 5lbs in a few days. It is great but concerns me.