i HAVE BEEN taking phentermine on a daily basis for about 10 days and haven't experienced the nightly crash.... i am normally bedbound and I have been able to stay out of bed all day or most of the day.... i have been able to take my boys shopping, got my hair done, can sit out in the sun by our pool, can get more work done around the house.... I also have added Vit D and B-6, laying out in the sun and getting a tan for the first time in a long time! I think of it as a summer of Vitamin D! I don't know if I am feeling better because of the change of the season? or the phentermine? or the newly added supplements...? I also added L-phenylalanine to raise dopomine levels (naturally) that is also why i started the B6.... i plan on adding more supplements, herbs and whatever i want to try cranial sacral ?something.... but, the point is I am feeling better! I hope it lasts!