Just sedate!?!? (you can't sleep on a Dex trip!) I wholeheartedly disagree, you can think what you want, but I know what I know.
I've gotten differentially comparable effects off DXM as LSD or shrooms.
I've been there, I know, I've tripped on it pretty hard.
Go to erowid and read what other people experience.
That's all I'm going to say about this, some people don't believe in free speech, so I'll suspend my rights and stop just to keep the peace.