I'm extremely sensitive to drugs, too. I'm allergic to quite a few (found these out the hard way), and have what doctors call a "sensitivity" to steroids. Ie, they get me high as a kite for a while and then I start hallucinating. I was taking them for a sinus infection my freshman year, and they built up in my system over the course of a week, gradually getting me higher and higher. The end of the week saw me falling out of chairs, thinking my Coke can was dancing, and crying because the ceiling was shrinking on me. Not fun. I'm just a tad bit scared of what other drugs would do to me, obviously. Not to mention the whole bit about them being illegal.