I used Hydroxyzine 50 mg oral every 6 hours, Fluocinonide ointment topical, and Clobetesol solution topical. The Hydroxyzine is what really did the trick. The topicals help, but the Hydroxyzine is what worked the best. My rash and itching were not under control until I got on high dose Hydroxyzine.
If you have medical questions/treatment issues like this it would be better to post in the Hepatitis C forum. This is the social side and not as many people visit here. Many more people will respond if you post medical questions on the following forum:
http://www.medhelp.org/forums/Hepatitis-C/show/75
By the way, welcome to the forum.