Chlordiazepoxide
"My doctor will not prescribe Xanax, Klonopin, or Ativan for anxiety, but he was comfortable giving me a script for Librium (chlordiazepoxide) 25mg capsules 4x a day for my anxiety.  Worked well at the beginning, but like all benzo's, the efficacy wore off after about a month of use.  Was great while it worked and it was very inexpensive!  Tapered off then went back on it a few months later and it worked like a charm again! On and off usage for close to 5 years now."