I weight 140 lbs and I want to try DXM?

I have tried it before and I took 140mg of DXM. However it was timed release pills so I never got high from it. I just want to get buzzed not a really strong trip. How many mg would I have to take at my weight. And is there a hangover, what is it like. Also, finally how does the buzz or trip from dxm compare to being drunk or high off weed.