How long do these phases last? This thread is very helpful in describing depersonalization and derealization. I am just curious to know the normal time frames that these last. I went over the same thing with my pdoc about 10 years ago when I was experiencing this to an extreme level but that would last up to 45 minutes feeling that way before I would come to (in a public setting, can't remember how it was at home) but can it also happen for just seconds or moments as well or is this something else? Does it last anywhere from 5 seconds to 5 hours or normally last so many minutes? Just wondering