I'm thinking if you drank enough beer you might not care how bad the poison ivy itches.
On a serious note . . . rubbing alcohol . . . hydrocortisone cream . . . the old stand-by calamine lotion.
I am intrigued with the jewelweek as mentioned by Squirrel Cache . . . would love to learn more.
As for me, never really had any issues with poison ivy . . . although there is a rash of something on my leg . . . my wife gets nervous every time I get near here since she's wicked allergic to poison ivy, oak, etc.
"Courage is not the absence of fear, but the realization that there is something more important than fear."
"Death is only one of many ways to die."