"i wanted this medication to work so bad - i got all the side effects except no sleep :( . for me it started working after only 10 minutes of taking it, and yes it does give a metallic taste. the biggest thing, hang on for a crazy ride! it made me very relaxed and have mild hallucinations (the blinds on the window and my bedroom door would look like they were slightly moving open/close or back and forth). im not sure how, but sleep never came! how i could be in that state and not sleep is beyond me."