Hi there. It may depend on which rash you have. I had the RIBA (Ribavirin) rash vs the Incivek rash. The rash was crazy itchy for a couple of days. I finally got it to calm down with Gold Bond Medicated Lotion. This isn't the 'best' picture, so click on 'all photos' to zoom out if it makes it easier to view.
http://www.medhelp.org/user_photos/show/236075
I have been itchy on and off, throughout, but no new rash. I am treating with Victrelis, and am thankful not to have to deal with the INC rash, which is significantly worse, and longer in duration (from what I have read here).