I found out the hard way how difficult it is to get off Xanax. My MD never warned me of this . 3 days with no Xanax sent me to the ER with 300 BP.. horrid headache, nausea. I thought I was dying or having a stroke . ER team did a brain scan to check. People must be made more aware of this. Check with your Pharmacist. I did not have this problem with Prozac…quit easily.