insomnia
"I took 15 mg dose for about a year almost nightly. At best it only had a mild effect at helping me fall asleep and did not allow me to sleep longer than my usual four to five hours. Two unfortunate side effects occurred. Occasionally I would get sleep paralysis which is being fully aware mentally while your body is frozen in a sleep State. This lasts for a few minutes. The other unfortunate side effect is intense grogginess for most of the next day. I found that I spent much of the time during that year sitting in a chair during the day because I did not have the mental or physical energy to get up and do anything. Obviously one gets a tolerance for the drug soon and I would say that after about a month there was virtually no benefit"