I Am Current Currently Receiving The Generic Form Of Herceptin,

I am current currently receiving the generic form of Herceptin, once every 3 weeks. I am curious as to the cost diff. between the generic and reg. Herceptin. It is working very well, I may add. Tumor free going on 18 months! I had esophageal cancer surgery. The HER 2 cell structure was discovered by a lung. My oncologist put me on this regimen, after several app. of more powerful chemo therapy, until the tumor dissipated.