Some people just don't get all that fucked up off of DXM. I had this friend who routinly took over 1000 mg to trip hard and would take like 300 or 400 before school to make the day a bit interesting. He said those doses only gave him a bit of a buzz. I took 150 mg and I was tripping motherfucking balls all night long. All people are different so the best bet is to find your comfortable point by starting low and working your way up.