insomnia
"Started zolpidem for insomnia due to anxiety from a cancer diagnosis.  Prior to this time, I had no sleep problems.  I started with 10mg, two nights in a row, but it had NO effect. The next night, I tried one and a half pills (15mg), which worked GREAT, but I could barely get out of bed after 8 hours of sleep.  I figured out that I could take 10mg about an hour before bedtime and a half pill at bedtime and get 9 hours of great sleep and no problems getting out of bed in the morning.  HOWEVER, after about 1 week I discovered NOTABLE memory loss, particularly with occasionally searching for words. I once came home from work and saw a note I had apparently written to my wife that morning, but didn't remember writing. Decided to switch medicines."