help! i'm on lexapro and wondering when its going to start working. its only been five days but i'm jumping out of my skin. was taking ativan for panic attacks and pdoc switched me to klonopin to take as needed until the lexapro starts working. i read the list of potential side effects ofthe klonopin and am afraid to take it so its just the lexapro and last night (actually early this morning) i had a horrible panic attack and at the moment my chest feels all hot and my arm is tingling and i'm freaking. any one have an idea how long til the lexapro works? any one take klonopin that can tell me its not going to kill me? i am a mess right now.