I remember I had to pause the film and leave the room to calm down a bit. Never anything like this happened to me while watching a movie. Definitely not for everyone.
IIRC I have the uncut version and its 1:36:18 with end credits included. The cut version is rated Unrated in the US, the uncut is NC-17 and released by Criterion. There is also an Australian cut version.
imdb has a list of the different versions under "Alternate versions", but obviously it contains massive spoilers as it lists the missing scenes.