I'm allegeric to ivy, sumac, and oak. I breakout like crazy.
Although this year is the first time I went thru some ivy, cutting hedges and my left hand and arm blew up.
I just took some Benidril. And it cleared up.
My personal doc is good. I just call and tell him and he calls in the 7 day blister pack. Lucky for me I've been able to avoid that the last few years.