Well I have been on it for about 3 weeks now.. I am taking it for depression along with Citalopram. Was put on it to give me an energy boost considering i feel tired all the time. Well the first week i could not fall asleep.. I'd lay there for 3 hours wide away!!! so the pharmacist told me to take Benadryl.. well i took that still took me awhile to fall asleep but not as long.. then was completely out like a light!!!! would sleep through my alarm!!!!But now.. I ITCH!!!!!!!! Behind the ears, back of my neck, my forearms... I'll break into little bumps on my forearms.... and also itch in between my thighs!!! So hopefully this will eventually go away!!! Have not spoke to the doctor yet about this.. The first couple weeks i felt down all the time.. but now I am feeling a lot better! so for the most part I think it is help.. besides the constant itching!!!!! I found that calamine and clear aloe have been helping some!