insomnia
"I originally was prescribed 2mg, which stopped working after a few weeks. I then was upped to 3mg which worked like a charm, but then after a month or so, again stopped working. And if my sleep was interrupted it caused me to feel drunk. I still take this, but I take it now at a pill and a half. It's frustrating that tolerance builds up so quickly, but otherwise it works well if you follow exactly how to take it."