OK, you know I had to put my 2 cents in about narcotics (well, I hope y'all don't mind if I just put 1 cent in-cause I am dead broke! ). Obviously, we all react differently to narcotics. But, it seems like a lot of us react to morphine the most. I once had a severe anyphalactic reaction to morphine because the stupid (sorry, but to do what she did, she had to be stupid) nurse gave it to me IV and instead of either mixing it with saline or giving it to me very slowly, she slammed it into my vein in one quick action. This must have been over 10 years ago when this happened, and I can still "feel" the burning and itchiness in my face and it ran down to my hands and feet. I got really bad hives and they had to give me benedryl and epinephrine. Basically, she almost killed me-by not paying attention to what she should be doing.
Anyway, I am also allergic to codeine, but I'm not allergic to hydrocodone (Vicodin). I wonder if this is because vicodin is a synthetic narcotic and codeine is a pure narcotic. Who knows? I'm also allergic to tons of anibiotics, too.