 [ Symptoms ] how does xanax affect deep sleep i use a cpap machine and just recently had two sleep studies the first without my cpap and the second with the results on both tests show that i am not entering the deep sleep   n3 state of sleep at all and was told that xanax suppresses this cycle is this true i am planning to speak with my primary care doctor about an alternative med for anxiety as i really need to get deep sleep as i am usually very tired on a daily basis thank you [ Disease ] xanax relaxes you so you do not dream and keeps u from being interrupted keeps you in rem sleep so you relax more that is what it does for me at any rate