Triazolam
"I probably hold the record for the longest regular use of this drug!   Started taking Halcion .5 mg in 1982 (the year it came on the market, I think) and have taken it nearly every night for the past 33 years.  In all that time, I have missed maybe 20-30 nights total.   It is effective, staying in the bloodstream just six hours so you don't wake up groggy.   It works fast and helps me GET to sleep, which is my main problem.   I occasionally try going without it, but almost always get up around 1 a.m. if I haven't fallen asleep and take it.   After a number of years (maybe 8-10) the .5 mg strength was no longer available so I have taken .25 since then.  Frustrated that insurance will not cover it as it's been a great drug for me."