I have been taking 1mg of xanax for about the last 8 months for severe insomnia, recently the doctor I was seeing closed his practice <span style = 'background-color: #dae8f4'>and</span>
he referred me to another doctor whom he transfered his files to. When I went to her to refill my perscription she switched me from xanax to ativan
without tapering off the xanax. I have not slept in 4 nights and
am wondering how long it takes for the switch to become effective.