purpose: evaluation of aryogen trastuzumab biosafety. design: A randomized clinical trial to evaluate biosafety of trastuzumab produced by aryogen (™Hercease) in comparison to ™Herceptin. setting and conduct: first all staff will be educated through conducting the trial and then patient assessment will be held by surgeon. after introducing patients, Filing, assining the 6 digit code to every patient and giving it to pharmacist to determine the intervention group will be done. eligible patients will be treated by chemotherapy 12 weeks after breast surgery. inclusion criteria: female with age between 18 - 70 years; HER2+ breast cancer. exclusion criteria: bilateral metastatic breast cancer; other malignancies; renal, liver and bone marrow insufficiency; intervention time: from April 26, 2014 up to 1 year. chemotherapy regimen: first we inject Docetaxel (100mg/m2) in days 1,22 and 43. also infusion of trastuzumab (4mg/kg) as loading dose at first day and 2mg/kg as maintenance dose in days 8, 15, 22, 29, 36, 43, 50 and 57 via IV route. after that in 3 periods with 3 weeks interval we will infuse 5FU 600mg/m2, Cyclophosphamide 600mg/m2 and Epirubicin 60mg/m2 at first day of each interval. patients in control group will recieve the same regimen in test group but with trastuzumab of aryogen. primary outcome measures include incidence of drug related adverse effects, and clinical information. secondary outcomes include: ECOG grade, blood test for evaluation of blood factors and EEG for assessment of cardiac arrhythmia.