I have Ambien 10mg stockpiled in the cabinet and Xanax and was desperate enough after already not sleeping for 2 nights that I took 40mg of Ambien early (like 8pm) hoping to just pass out.......the only thing it did was make me feel kind of sleepy and unable to follow chat much or very slowly but sleep never came. If my daughter were not still here (tonight is her last night home from college) I would have taken a whole handful for even 30 minutes sleep........I need sleep badly.