We have Poison Ivy growing in our Yard, so we have to pepare ourselves every year for someone to get it! no matter how hard we try to avoid it, someone always gets it, usually hubby. We have found that Fels Naptha Soap is fabulous! fels Naptha soap is a heavy duty Laundry soap, that comes in Bar form. It does great at drying out the poison Ivy. We use this a reventive measure as well, if we even think that we have touched poison Ivy, we wash with this soap, itis always on the top shelf in the shower. you can find it at a grocerystore, in the laundry section. It works great! we have two kids, and they use it all the time!
here is a pic of what it looks like.



Good Luck!!