Clonazepam
"I was put on klonopin at age 17. I took it as prescribed for 20 years, going from 0. 5mgs to 3-4mgs a day. While it worked great for anxiety and insomnia, I wish I had never taken this medication. Last year I was detoxed off of it. When I tapered off I didn't sleep at all for 11 days. After that I had extreme anxiety and agitation. I couldn't sit still for months, I had to take a non addictive medication to be able to sleep at all. I was unable to eat well for months. 
Doctors don't think to tell you that this medication makes you physically dependant. You cannot stop abruptly or you risk seizures. It is made for short term use, about 2 weeks. I wish I had never taken this medication. I will never take another benzodiazapine again."