I remember when I was on Lith.....my memory went to shit. I had a hard time reading & remembering as well, the dose I was on had me in a fog all the time. I can sympathize with you, I've been there. Are you able to meditate at all? If you can, try to think of only one thing to concentrate on, and say it over & over in your head. Make a very conscious effort to remember what you are thinking about. And just try to be very aware of what you are doing or saying or even reading, in other words "mindfulness". Vigilance is key. It sucks that we need to be hyper-aware [especially when you are feeling doped] but if you are, then you will be able to focus on your book or your job or whatever you wish.
It is a very difficult thing to do, but once you can, then you will be able to feel less spaced out and more in control.
Hope that what I wrote makes sense, and that it helps.
