I have been taking ativan only when i feel like i need it. never in 5 years have I had any sign of withdrawal nor any adverse effect. but AMBIEM sleeping prescription can make me catatonic the following day. and i am totally unaware of it. my bosses have approached me with the fact that i appear drunk. and i am not aware of this behavior. thank goodness my boss realizes my health problems and is aware I am being treated with a variety of medications and has been extremely supportive.