Not sure if this is the same or related... but I was recently on Klonapin and Sonata (among others) and I found that I'd be writing something and I'll have 2 sentences and it'll feel like 20 minutes has passed when in reality, it had been 3 hours. And then I'd be reading something (closely and annotating) but then when I went to class the next day, the professor would be lecturing and I'd have no idea what he was talking about. My pdoc seemed to think the combination of klonapin and sonata was making me forgetful... apparently, both have memory-altering properties. Maybe something to look into? Definitely let her know about the forgetfulness though-- that's super important!