"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"