I experimented with DXM back in 2001. I was on Valium at the time, and my normal inhibitions against drugs that can actually do brain damage or kill you just wasn't there. I felt that since the literature showed that taking Valium with DXM reduced the risk of neural damage, I was covered. Which just goes to show you how badly Benzos like Valium mess up your thinking. Also, I simply couldn't stand the stuff unless I was already buzzed on Valium - it gave me this weird edginess, that the Valium took away. However, I never did push the dose past what DXM users call the "Third Plateau" - no out-of-body or Fourth Plateau journeys for me.
DXM doesn't really have a lot going for it. It does, however, enhance music, and to a certain extent visual art such as mandala software programs. So I would put on a big playlist, and watch Mandalas for several hours, and this would in fact produce euphoria, and a feeling of everything was going to be great. Well, everything wasn't great, so it was just the drug - it does raise dopamine levels I believe. It was weird. I would get CEVs of these strange rooms, that I suppose with higher doses I could have visited. Tetris was very weird on DXM. And Pizza was very good. But once I kicked the Valium, I gave the stuff up, and haven't missed it at all. There were some mild psychedelic effects; once, I was walking through the woods, and found the perfect "Wizard's Staff". For an hour or so, I became "a Wizard, and a Wizard's Son". Lol.
What really annoyed me is that the day following a strong DXM session, I would get facial twitches and stutter on my words. That can't possibly be good. I'm glad I only messed with it for the 6 or so months that I did. NOT RECOMMENDED. There are much better and safer drugs out there.