If you're not allergic to poison ivy, you just haven't been exposed enough.
I never did believe that old saying, because I never was allergic to poison ivy. When I was a kid, I could walk through the stuff, and not even get a blister. Even recently, I might get one or two blisters while Milady would break out in full-body rashes.
It seems that now, I've been exposed enough. My left forearm is a constant and solid rash, and my right arm is a third of the way there. I am alternating calamine lotion, hydrocortisone cream, and antihistamines. Generic Zyrtec was definitely the best antihistamine, but the 24 hour dose only lasted 12 hours...
Excuse me while I work on taping on oven mitts.