Well, one time I took cough syrup with Psuedo-Ephedrine in it. It was the only time I've ever experienced an out of body experience with DXM. It was also only one bottle, 354 mgs.

Also, if guiniffsean only induces vomiting, that's not too bad. There have to be other effects of it for you to not use it. About an hour and a half to 2 hours into a trip, most people puke anyway. And as asoon as they do, they usually start trippin really hard.