I am taking Ranitidine (like Zantax)and Aerius (antihistimine)as well as cortasteriod cream. I recently switched bath and body wash products to Aveeno.
I have been using Tide laundry detergent for a long time and now I use a hypoalergetic detergent, Baby Soft by Purex, and I think I might be getting results.
I can sympathize with your daughter and I wish her all the best!