Corticosteroids and antihistamines are probably your best bet. The blisters, itchiness, etc. are all allergic, histamine-based immune responses to an oil in the poison ivy. That oil (forget the name) bonds to your skin once you touch it. You can't spread it by scratching. The reason it 'appears' to spread is that poison ivy takes time to show symptoms, like 48-72 hours or so. In that initial time, you can spread the oil from when you first touched it/contacted it, if the source is still contaminated. If it is on clothes/pet, you can end up contacting it several times over a day. You scratch your face, touch your arm, etc. Then the patches appear at different times based on when you contacted it - also depends on how much oil was contacted. Higher concentrations may show symptoms earlier. Once the rash is there, you can't spread it from touching the rash.

Not much else to do but wait it out. I think people's responses to it vary - some get over it quickly, others less so.

__________________
Chris
2007 E550 4Matic - 61,000 Km - Iridium Silver, black leather, Sport package, Premium 2 package
2007 GL450 4Matic - 62,000 Km - Obsidian Black Metallic, black leather, all options
1998 E430 - sold
1989 300E - 333,000 Km - sold
1977 280E - sold
1971 250 - retired

"And a frign hat. They gave me a hat at the annual benefits meeting. I said. how does this benefit me. I dont have anything from the company.. So they gave me a hat." - TheDon