I use Calagel and Tecnu products - I keep Tecnu with my tackle.  Check out this website - 
www.teclabsinc.com.  The tecnu stuff is also good to wipe your gear down and wash clothes with as the oil from the ivy can stay on stuff for a long time.  When I have it real bad, I go to my M.D. and get prednisone.........not fun.