Pretty much a waste of time if you are looking for anything meaningful. A junkies life ends up down the shitter (literally) & the rest of the movie tracks the nihilistic consequences. The Buddhist book of the dead is thrown in as a reference but not actually followed. Very arty & clever camera work is the only plus.
Gaspar Noe is a singular filmmaker continuously pushing technical and tasteful boundaries. There are two versions of ENTER THE VOID on this DVD/Blu Ray, I watched the longer cut screened at Cannes in 2008 or 2009 -> at 2.5 hours+ it is an immersive unique experience - however, I found the first person POV of the first 20 minutes very off-putting and a steep way into the film - once this angle changes the film gets easier to enjoy and follow. You certainly won't see another film as handsome, sonically impressive or neon-soaked as this - but I just didn't click with it because the characters were drug-dealing losers with zero personality.
Sorry.