I am on ativan and have been taking it for a little over a year. It was originally prescribed 1mg at bedtime and 1mg prn. I am now down to taking it just at bedtime, as I have learned some coping skills to deal with my attacks. There have been a few times that I really thought that I needed one prn, but didn't take one. I ran out the other day and am waiting for my pdoc to get it to the pharmacy. I have been off it for the past 4 days, and my sleep is really affected by it. I am not sleeping as well as I do when I am on it.