Good stuff. Take a shower with the hottest water you can stand. Then the coldest. Then again with the hottest. Then apply, rise with cold water. Kills the itch and does an OK job of drying it out.
Also Children's Benidry Spray for Poison Ivy. Great stuff for killing the itch. Years ago, hot summer, my crew and I (Wife included) had a project that we could only work at on Wednesdays. Total of 5 days to clear all the Cedars. Poison Ivy and Oak mixed threw it all. I very seldom get the stuff, but on this job, I was loaded. That Children's spray was a blessing.
Still talk about that job to this day, what made it so memerable...in the middle of the 5 weeks of hell, we had a wedding to attend. Three of us sat at a table with that bottle of spray between us. My wifes nylons were shredded before the wedding was over
Best cure of all, go for a swim in the Ocean. The salt water dries it out quickly and stops the itching.
Word of warning, many like me will talk about using starting fluid, gas, alcohol, etc. If you really get a rash from small exposures, never use our home brew cures, you'll spread it big time. Sorta like some people will dry it out from swimming in a pool with chlorine and others will spread it all over going for that same dip.
Best thing you can do, if you know you've been in it...get home wash those close by themselves (more than once or you'll regret it next time you put that sweatshirt on) and take the hottest shower you can stand.