I've been taking .5mg Xanax before bed for 7 years for chronic sleep disorder with pretty good results. The first 6 years, I had 10 week vacations in the summer and would wean myself off over a 2 week period with the primary noticed symptom being that I was unable to fall sleep and/or awoke about every 5 minutes. I felt lousy, but I attributed that to sleep deprivation. It took a couple more weeks to get back to my pre-Xanex problem of falling asleep just fine but waking up after only 3-5 hours of sleep about 3 nights a week with 5-7 hours of sleep the other nights-which was bearable for the remaining 6 weeks when I didn't have to go to work every day. I have now taken .5 mg of Xanax each night for 1 year straight because I have recently been through major life changes and was already stressed out and didn't want to add withdrawal and the resulting lack of sleep to my stress load. Also, I no longer have 10 week vacations. As my stress levels have begun to decrease and with the recent media coverage of problems with Xanax addiction, I decided with my physician that it was time to try something different - He prescribed Ambien for sleep with 2.5 mg Xanax during the day for the first week. The first two nights after the switch, I quickly fell into a hard sleep with the Ambien but awakened after 4 hours feeling extremely jittery-not unexpected. Nights 3-5, I slept 6-7 hours and awoke feeling refreshed- I was thrilled. Nights 6-15, it was back to waking up after 3-4 hours of sleep, but with a bad hangover. I am now on day 18, experiencing headaches, dizziness, forgetfulness, poor concentration, clumsiness and fear of losing my job or wrecking my car. My question is: Is this a result of Xanax withdrawal, Ambien side-effects or sleep deprivation? It seems worse than anything I experienced during previous episodes of weaning off Xanax. I didn't have to go to work while doing this before so maybe that alters my perception somewhat. At this point I don't know whether to continue with the Ambien a little longer to see if things improve. (I've already experienced performing actions which I don't remember under it's influence.); go cold turkey on everything; or resume the Xanax for now with plans to try again later when I go on vacation. It will ruin my 4 week vacation of course but I might still have a job.