Dunno, it surely felt like it poisons me, haven't thrown up in YEARS and even now, I can't remember having felt this way before, I was shaking uncontrolably while all I wanted to finally get it over with, took me 20 minutes to finally throw up and now feel a little relieved.
When I was a little kid, I was allergic to cough medicine, I took it once, and MAN I went for one HELL of a wild trip, some pretty scary shit, ran around the house screaming bloody murder, some medicines can have some pretty nasty side effects.