Pertuzumab 420mg injection also known as Perjeta is used in the treatment of breast cancer. It is a monoclonal antibody that binds to the human epidermal growth factor 2. This as a result stops the growth of cancer cells. It also stops the tumour from spreading to the other parts of the body. It is given as an intravenous injection usually every 3 weeks. Pertuzumab 420mg Injection Price is very high however, it can be purchased from Magicine Pharma at an affordable range.