I had 8 treatments of Erbitux. I had some pretty severe rash/acne reactions which the doctor said was good news. The more reaction the more effective it is in treating the cancer they tell me. I wound up with hundreds of pimples on my face, scalp,neck and upper back. Less so on my chest. It left a good deal of scarring, something like you'd expect to see with severe acne in a teenager. I can live with it. I am alive and doing well now, 6 months out of treatment.