I haven't heard of Pinetarsel...what is it?

My cream is called Eleuphrat...and I'm taking Polaramine too... The itch is driving me insane...I don't know how anyone copes with this for very long it's only been about 6 days for me and I'm going insane. My blisters are huge already and I'm desperately trying not to scratch. My OBS is booking me in to see a dermatologist today so hopefully he will have some ideas!?!?