I have had problems with poison ivy my entire life. I haven't found anything that works besides the shots (corisone maybe?) that I can get at the doctor's office.

Until last turkey season when I ordered some stuff call ivy off. I've gotten poison ivy twice since then and it has literally erased it in a few days time. It's not very expensive and it works. I tell everyone I know that's allergic to poison ivy/oak/sumac to order some and keep it around. I keep mine in the shower full time in case I find any more spots since I'm always in the woods scouting or hunting or whatever.

http://www.ivyoff.com/