"i&#039;ve been on this medication only one week but am cautiously very optimistic. prior to this i was on citalopram but still feeling very low and sleeping poorly, feeling like i needed to be in bed 12-16 hours a day. now i am waking naturally after only 8 hours sleep and finding it much easier to concentrate at work. i can hardly believe it is working so quickly but i feel so much better. i&#039;ve had no side effects."