I find that I am extremely tired but when I do finally get to sleep I wake up constantly? When I took 5mg I felt pretty good but with 10mg I do feel amazing except for the above issues. I want to continue this medication but the sleeping issues are making me feel like crap. Has anyone ever taken 5mg in the morning and 5mg in the afternoon? Or split a higher dose. I think this medication is great but I think I need to play with it :)